Ethiopia Map - Geological Survey of Ethiopia

Ethiopia Map - Geological Survey of Ethiopia

34
o
38
o
36
o
40
o
42
o
44
o
46
GEOLOGICAL MAP
OF
ETHIOPIA
N
R
S
E
T
A
R
E
4
S
O
U
S
11
SU
A
a
L
I
E
A
N
19
E
N
A
40°
42°
44°
R
4°
O
21
Y
38°
46°
S
36°
K
Qh
MIT
SIW
A
CH
A
LF
GU
34°
46°
ZUL
4.Gological Map of Adiarkay Sheet (ND 37 -10) 1:250,000.Preliminary compilation
by Tsegaye Hailu (1975) ,EIGS.
5.Geological Map of Mekele Sheet (ND 37-11), 1:250,000.Geology compilation
by Y.Arkin et.al. (1968-1971),EIGS.
gt3
gt3
Q
Nad
P2a
Abderafi
P2a
P2a
Ja
b
Metema
Q

P2a
GONDAR


Qbt
Qr
P2a
Qb
Qh
Kobo
N
Nmr
PNa
PR2b
gt2
PR2b gt2
PR2td
or
gd
gt3
Bela
dt
gt1
PNmb
Jila
b
o
ilo
sh
Be
Ntb
Q
ARl
gd
Qb1
dt
gd

PNmb
Pzt
Pjb
dt
Q
Pjr
a
Kib
Q
ARb
gt2
Q
gt5
Qh
Q
ARl
ARk
ARa
ARl
NQ
ARy ARy NQ
ARl
Qb
gt1
NQ
ARl
gt1
Qh
Om
o
Qh
ARk
ARa
ARk
ARl
ARk
ARl
ARk
ARl
ARy
ARl
ARa
ARl
ARy
Q
Qh
Qh
Q
Nts


Nts
Nts
gt1
Q
gt3
ARy
ARl
Qh
ARk
Q
dt
ARa

Konso
ARa
Q
gt1
Q
Q

Nts
ARy
Yabelo
Nts
Nts
Q
ARy
ARa
PR1w
gt3
Nts
gt5
PR1w
gt1
ARl
Nts
Qb
34
o
Qb1
E
K
36
o
N
38
o
ARa
ARl
Km
Q
Jg1
Jh
Kb
Pa
P2a

6
Kf
Pi
Km
ab
eS
he
be
le
Pi
Pj
Kb
Km
Kg2
Kg2
SECOND EDITION,1996
Kf
Q
ARl
P2a
Q
Q
Compiled by
Kg1
Cartography by
Q
Q
Topographic base map is obtained from the first Edition of Geological Map of Ethipia ,scale
1:2,000,000 with ammendments.Published by the Ministry of Mines ,
Geological Survey of Ethiopia,GSE.
O
Kg2
P2a
Note: The delineation of international boundaries must not be considered authoritative.
Projection-Longitude/Latitude ( WGS 84)

Dolo Odo
4
Copyright reserved
Copies of this map may be obtained from Geological Survey of Ethiopia
P.O.Box 2302,Tel( 251 - 1) 463325,Fax. (251 - 1) 463326
PR2a
ARl
gt4
gt1
PR2a
Moyale 
Kebede Woldie and Nigussie Teshome,GSE,2005.
Nigussie Teshome and Kebede Woldie,
Cartography and Surveying Service,EIGS,1996.
Ju
ARl
gt2
gt1
Mengesha Tefera, Tadiwos Chernet and Workineh Haro
Regional Geology Department,EIGS,1990.
Kg2
P2a
Q
Vectorization by
Km
P2a
Kg2
Kg2
Kb
Q

Km
Q
Q
P2a
gb
ARl
gt4
Email: geology3@telecom. net. et Addis Ababa,Ethiopia,2005.
A
Y
40
o
42
o
o
Kg2
Km
Kg2
Jg2
gravity map to around 50% of the country.
P2a
Q
gt4
gt4
gt4
U G A N D A
 Mega
Q
Km
Gode
Kg2
Q
Kg2
Q
ARb
P2a
P2a

P2a W
Kg2
Kg2
map of Ethiopia and increase the coverage of the 1:250 000 scale
Pi
Kb
Q
P2a
Q
P2a
Jh
ARl
ARb
Kg2
P2a
Q
P2a
airborne geophysical surveys, to compile a 1:500 000 scale gravity
Q
Kg2
Q
Km
Q
Q
Jg2
gt4
Q
gt5
Jg1
Dawa
Jg1
ARa

Q
Kg2
gt2
gt2
Q
Qb1
Kb
ARl
gt2
Welwel
P2a
Jg2
Q
gt2
ARa
ARa
Qb1
4
gt4
gt2
gt2
o
PR2a
gt1
(2011-2015) to cover the country by low–medium resolution,
Q
Kg2
basement has been covered by airborne geophysical surveys. The
Ethiopian Government has approved a five-year strategic plan
Q
Q
P2a
o
P2a

Jg2
Kg2
Ju
gt1
8
Q

Kebri
Dahar

Q
A considerable part of the greenstone belts in the Proterozoic
A
Pk
Pa
Pi

P2a
Jg1
I
Jg1
Km
PR2a
dt
Qb1
Nts
Filtu

gt3 gt3
ARa
Q
Q
gt4
L

P2a
Jh
Jh
Jg1
Kg2
ARl
ARa
A
Kb
Jg1
the compilation of a 1:2 000 000 scale geochemical map and
Pt
Kg1
gt1
was started and coverage of 50% is expected before 2016. Further
metallogenic map has been initiated.
M
Q
Kg2
compiled. From 2009 systematic geochemical mapping on a scale
of 1:250 000 integrated with geological and geophysical mapping
Pt
Q
Jg1
Kb
o
Major plugs or group of small plugs
Syncline : upright,overturned
Jh
Ju
Kg2
Q
Jg1
Negele
Adigrat Formation : Triassic-Middle Jurassic sandstone.
Ju
ARl
gt1 ARa
gt1
gt1
Nts
Q
gt3
10
Basic dykes and sills

Ja
P2a
P2a
Kg2
P2a
Q
Km
Jg2
Jh
Field of small basaltic vents
P2a
P2a
P2a
Jg2
ARl
gt1
Nts ARy
dt
Nts
gt1
ARl
gt3
Q
Nts
gt3
PR1r
ARl
gt3
gt3
gt3
ARy
Other major volcanic edifices
Caldera
Abay Formation : Middle-Jurassic limestone,shale and gypsum.
Hamanlei Formation : Oxfordian limestone and shale.
P2a
Jg1
P2a
P2a
Jg1
maps and for selected areas more detailed maps have been
Shield volcano of the Ethiopian Plateau.

P2a
Jg2
P2a
Kg2
Ju
Jg2
Fault barb on downthrown side.
Q
P2a
P2a
date c. 20% of the country has been covered by 1:100 000 scale
Geological contact : observed,inferred.
Ju
Jg2
P2a
Kg2
Q
Jg1
gt3
ARy
PR2a
PNmb
PNmb
dt
Q
Nts
Wel
mel
assessment of the mineral potential of the Precambrian rocks. To
OTHER SYMBOLS
Pa
P2a
P2a
 Imi
P2a
ARl
different parts of the country with particular emphasis on the
Serer Woin
Jg1
P2a
P2a
P2a
Jg2
Geochemical surveys on different scales have been conducted in

Kg2
Kg2
Jg2
Jg
Gabbro
Ju
P2a
Kg2
Kg1
gb
Faults : observed,inferred.
Jh
Ka
P2a
gt3
gt3
gt4
PR2k
gt1
ARy
Jg1
P2a
gt4
gb
ARl
ARa
ARa
Shakisso PR2a
gb
Ju
gt3
gt3
P2a
Qb1
gt3
Nn
dt
PNmb
Q
Pjb
dt
Pjb
ARa
gt4
gt4
PNmb
gt3B
id
dim
o
Kibre PR1w
Mengist
gt3
PR1w
dt
PR2a
gt1
Q
Qbb
ARk
Pjb gt4
gt4
ata

Agere Mariam
PNmb Q
Q
gt3

PR2a
Nc
PR1r
PNmb
PNmb
gt1
ARa
Pjb
Pjb
Nts
Chew
Bahir
NQ
Gidole
ARk
ARa
Q
Lake
Turkana
Pjb
Pjb
ARy
dt
ARl
Pjb
ARa
gb
Qb
Qb
PR1w
Aw
Pjb
ARBA MINCH  Pjb
Pjb
gt4
Q
Lake
Q
Chamo
ARk
gt4
P2a
Tonalite
Diorite
o
Jh
P2a
Kg1
available both in hard copy print and soft copy.
12
a) Urandab Formation (Ju) : Oxfordian-Kmmerdgian marl and shaly limestone
b) Antalo Formation (Jt) : Limestone.
P2a
Jg1
P2a
P2a
tn
dt
Agula Formation :Kimmeridgian shale,marl and limestone.
Jt
Ju
Kg2
and full coverage is expected before 2016. These maps are
Jh
Ju
Pj
Jg1
present 51% of the country is covered by 1:250 000 scale maps
Granodiorite.
Jh
P2a
Kg2
the compilation of 1:250 000 scale maps is still ongoing. At
Granodiorite and tonalite.
 Misrak Gashemo
Kg2
le
na
ARa
Qh
ARy
Qh
Nn
Yirgachefe
Qb
Pre - tectonic and syn - tectonic granite.
 Degeh Bur
Jg
Ge
NQ
gt1
gt3
ARk
ARl
Qh
ARl
gt1
Qh
Pjb
Q
Q
Pjb
Pjb Qh
Jinka Qh
 gt1
Pjr

ARy
 Dila

PNmb
Syn - tectonic granite.
gt1
Pi
Jg
Ju
Jg1
Ju
PNmb
gt2
Gabredarre Formation : Kimmeridgia -Tithonian ; (Jg2) Upper unit and (Jg1)
Lower unit :Limestone with shaly and gypsiferous units.
P2a
Jg1
Qb
Qb
Jg2
Jg1
Jg1
Jg
Jg1
PNmb
Q
Qb
Q
Late to post - tectonic granite.
P2a
Ncb
Nn
PR2a
gt4
PR1w
Nmr
Q
Ntb
Pjb
gt1
Q
Pjb
L.Abaya
Qh
Pjb
Kibish

ARb
Q
Wondo
Post - tectonic granite and syenite.
Synform
Jg2
Jg2
map, which was first published in 1973 and edited in 1996, while
Mustahil Formation:Aptian-Albian limestone,marl and sandstone.
Q
Ju
Ju
yb
gt2
Q
Kokosa  Nc
Yirga Alem

Q
Pjb
Pjr
Nb

Nts


Qr
Ju
Qg
Ju
gt4
gt3
Korahe Formation (Main Gypsum Formation) : (Neocomian/Barremian)
Upper Korahe (Kg2) gypsum, shale, dolomite and anhydrite intercalation
Lower Korahe (Kg1) shale and limestone with basal sandstone.
O
Kg2
Mana
ARb
ARb
Pjr
Pjr


Pjr
Q
ARa
ARl

Nts
Qr
Q
Pjb


P2a
Qd
Q
ARl
Goba
Ncb
ale
ARb

Pjr

gd
Nc
en
G
gb
Nb
Qb1
Dodola

AWASA
Ferfer Formation:Albabian-Cenomanian shale,dolomite and anhydrite.
P2a
Jg
Alkali granite and syenite.
S
Jg2
Qg
Qg
gt5
P2a
Jg
The entire country is covered by this 1:2 000 000 scale geological
Pa
Jg
We
gb
gd
Pjb

o
gt1
Jg
Kb
Kf
P2a
Jg
o
Anticline : upright,overturned
Jh
Ju

Ginir
Konso Group : Hornblende, pyroxene,garnet - pyroxene gneisses
and amphibolite with minor metasedimentary gneiss.
14
Antiform
Jh
Qg
Robe
Alghe Group : Biotite and hornblende gneisses,granulite and
migmatite with minor metasedimentary gneisses.
ARk

Kg1
Nc
Nn
Amba Aradom Formation:Sandstone,
conglomerate and shale.
Belet Uen Formation:Late Cretaceous (Cenomanian -Turonian)
limestone with some sandstone and shale.
Jh
Jh
Ju
ARl
Q
Ju
Dare
Nc
Ka
Ja
Jg
Jh
Awata Group : Biotite, hornblende,sillimanite - garnet,calc - sillicate
and quartzo - feldspathic gneisses,marble and granulite.
P2a
Jijiga
P2a
Qg
Qb
Ju
Qr
Qr
Nn
Q
Pjb
Pjr
Pjr
Nn
Qr
Qr
Ju
Jg
Yavello Group : Quartzo - feldspathic gneiss and granulite.
ARa

Ju
Ju
ARy
Togochale
Jh
P2a
Ju
Ju
 Shashemene
Lake
Awasa 
Q
Qbb
Pjb
gd/tn
dt
gd
Usmo
gd/tn
Qd
Sodo 

Pjr

P2a
Jh
Qg
Scian
an
Jh
Auradu Formation:Late Paleocene-Early Eocene limestone.
Jessoma Formation:Late Cretaceous-Paleocene sandstone.
Jh
Jg
Baro Group : Biotite,hornblende - biotite,garnet - amphibole,
garnet - sillimarite,calc - silicate and muscovite gneisses.
gd
Pj
country. The basement hosts nearly all known gold occurrences.
ARb
gd / tn
Pa
is the Proterozoic basement constituting about 18% of the
Late Proterozoic Ultramafic Rocks : Serpentinite, peridotite
dunite and talc schists.
Ju
PNab
Nn
Qd
Jh
Jh
Jh
Q
Jh

Babile ARl
Ju
Jh
Ncb
Qbb
Qr
Ja
Jh
Ju
Unga
ta
Bekoji

Ncb
Jh
Ju
Jg
Qg
PNa
Qd
Lake
Langano
Qr
Qr
cia
Din
PR2b
ARb
Alaba Kulito

Q
Pjb
Q
Q
Qr
Pjb
 Waka
Pjr
ate
Bil
gt1
gt1
Gojeb
Qbb
ARl
Ju
ARl
Ja
P2a
HARAR
Ja 
Jh
Wadera Group : Metasandstone,quartzite,biotite and muscovite schists.
EARLY - LATE JURASSIC
ARl
Q
Q
Ja
Jh
 Goba
Qr
Jh
Ja
ARl
Ja
PR1r
Ju
Jh
Taleh Formation:Erly-Middle Eocene:Anhydrite,gypsum,
dolomite and clay
Jb
Jh
Ja
Jh
Pt
Qb
Jh
Qr
Lake
L.Shala
Shala
Qbb
Ju
PNa
Ju
Ja
Ju
Sac
ata
Ju
Ka
Ja
Ju
Ka
Na
ARl Jh
ARl
Dire Dawa
Ju
Ja
Pk
Karkar Formaytion : Middle-late Eocene limestone with
marly intercalations.
Ju
ARl
Ka
PNa
Jh
Jh
PNa
Jh
Jh
PR1r
Ju
Na
ARl
PR1r Ju Ju
Ja
Ju
 Robe
Ncb
Qd
Ka
PNa
ARl
Ju
Ntb
Ntb
 ASSELA
Q
Qbb
Qr
Na
PNa
Nn
Q
Nc
Ju
Nc
Qr
NQtb Ntb
Qd
Qbb
Nb
Qr
Qr
Q
Q
Bonga

ARl
PR2b
Lake
 Ziway
Lake
Abijata
Qr

Hosaina
Nn
Ziway
Qr

Pjr
Pjb
Qr
Ka
Jh
Ju
Qh
Qh
Ka
Nmr
PNa
Ka
Na
Nc
Jh
PR1w
LATE JURASSIC
Qh
P2a
Jh
Nc
Nc
Nn
Pjr
gt1
gt1
gt1
6
Pjb
Pjr
JIMA

Chira
ARl
gd
ARb
LOCATION MAP
Agaro
Nc
Ashangi Formation: Deeply weathered alkaline and trasitional basalt
flows with rare intercalations of tuff,often tilted (includes Akobo
Basalts of SW Ethiopia).
Jag
ARl
Qh
Nc
ARl
Mormora Group : Biotite schist,gneiss,marble and graphitic schist.
Jimma Volcanics (Upper part) : Rhyolite and trachyte flows and tuff with minor basalt
Jimma Volcanics (Lower part) : Flood basalt with minor salic flows.
P2a
Jg
The most important terrain for gold exploration and exploitation
PR1r
PRECAMBRIAN AND PHANEROZOIC INTRUSIVE ROCKS
Aiba Basalts:Flood basalts with rare basic tuff.
Kg1
Jh
Qh
Nc
NQ
Alage Formation : Transitional and subalkaline basalts with minor
rhyolite and trachyte eruptives.
Kg2
Ndb
ARl
Na
Jh
Ka
Na
Qbb
Qh
PNa Jh
Qd
Qbb
Qr
Qbb
Qr
Q
Na
Tarmaber Gussa Formation : Alkaline to transitional basalts
often forming shield volcanoes with minor trachyte and phonolite flows
PNa
Qh
Ndb
Q Nmr
Na
Na
P2a
Nc
Qb
Na
Qh
Qh
PNtb
Na
Ndb
Nc
Awash

Nc
Qbb
Qr
Nazret
Qr
Ntb
Wolkite
Nn

Pja
PNmb

Qh
Na
Qh
Na
Qr
Qr
Lake Q Qd
Koka
Nc
Nn
PNmb
gt5
Mojo 
Qr
Q

Pja
Pja
ARl
ARb
gt1
gt3
Pzt
o
PNmb
Qbb
Ntb
Ntb
Gib
e
PNa
Nn
NQtb
Debre Zeyt
Qr
Qbb
Qd
Nc
Nc
PNmb

 




ARl
NQtb
Ntb
Q
ARl
Bedele

gt1
Pzt
k
gt3
PNmb
Qb1
PNmb
A
 Gore
PNmb
Pjb
PNmb
METU
Qbb
Q
Na
Qbb
Qh
Nn
Qb
NQtb
NQtb
Q
Adwa Formation : Trachyte and phonolite plug.
Km
Ndb
Na
Ka
Q
Qh
Qh
Qr
Qb
Qbb
Qr
Ntb


Nc
Qb1
Nn
ARb
gt3
ARl
PNmb
gd/tn
gt1
P
ib
PR2b
dt
PNmb
ADDIS
ABABA
Nc
Na
Qh
Dewele

Ndb
Nmr Ka
Nmr
Na
Ndb
Qh
Qh
Qh
Nc
Ntb
Ntb
Nc
Nad
occur, including those of the East African Rift Valley transecting
the country from south to north.
ARCHEAN
r
re
Je
o
gt4
PR2b
Qb1
Qb1
Na

Na
PNa
Lake
Lake
Abe
Abe
an
Faf
8
gt1
o
Bar
ARl
ARl
tn
gt2
Q
Qh
Qr
NQ NQ
PNa
Ambo

ARl
Qb
NQtb
Na
NQ
Qh
P2a
Qb1
 Bako
Ja
Qh
Qbb
Nn
Ka
Jb
gt4
e sa
Q
gt3
gb
dt
PR2b
tn



 gt3

PNmb
ARl 

PNmb
ARl
Jb
Jt
Ja
Ja
PNmb
Qb1
 NEKEMTE
Qb
Qbb

Molale
Debre
Birhan
P3a
REPUBLIC
Qr
NQtb
Qh
Qh
Na
i
ba
Ntb
Jt
Did
Ntb
gt1

gt4

GAMBELA 

 jikawo
Qb1
Ja
ARl
gt4
gt2
gt4
ARl
PNmb
gt2
ARl PR2b
PNmb
gt1
Geba
PR2b
dt
gt4
ARl
gt3
dt
ARl
gt2
gt3
ARl
Lake
Afambo
Qh
NQ
PNa
Qb1
Lake
Chomen
Teltele and Surma Basalt : Flood basalts.
CRETACEOUS
Q
Q
Na
Ntb
l
gt2
PR2b
gt4


PNmb Dembidolo




gt2
ARl

dt
gd
PNmb
gb
Ghimbi

gt3

PNmb
ARl
PR2b
r
Ange
Ja

PNmbgt1
PR2b
Ntt
gt3
PNmb
gt3
gt5
gd
gt3 gb
P2a
a
Ad
DJIBOUTI
Na
NQtb
Qh
Na
Qbb
Qh
Q
Q
Ndb
Qh
Qr
Qp
Q
Qr
Zegame

dt
PNmb
PNmb
Qh
Q
Qb
Ka
P2a
Nts
EOCENE
Qr
Lake
Gargori
Q Lake
Gamari
Qr
Qb
Q
Qr
Q
NQ
Qr
Mahal
Meda

Jema
Qb1
Jb
Ja
r
Muge
Gia
mi

Ja

Q
dt
na
ba
Da
Ntb
PR2b
gt3
 PR2b  
 








ARb

Q
gb
PNmb
Qr
e
Na
Q
Q
Na
PNa
P3a
Jb
Pzt
Tarmaber Megezez Formation : Transitional and alkaline basalt.
Mabla and Arba Guracha Formation : Rhyolitic domes,flows and
pyroclastic rocks of dominantly peralkaline composition with
subordinate trachyte and basalt flows interstratified at base.
Qh
Qb
Na
Qr
Qr
NQtb
Qh
Q
NQtb
Jt
ARl
Ntb
Pjr
Pjb
o
EARLY PROTEROZOIC
Nmr
Qh
Qp
Qr
Qh
Qb
Qp
Kemise 
Ka
Pzt
Qb1
PNmb
r
Gude
b
Gu
Tulu Wolel Trachyte with subordinate basalt.
LATE EOCENE - LATE OLIGOCENE
Na
Qr
Qh
Qr
Na
P2a
P2a
Ja
gt3
PR2b
gt1
PNmb
 agt3
Adola Group : Amphibolite,quartzite and graphitic phyllite.
Ntt
PNab
Qh
Na
Qb
Qh
Na
Na NQtb

DESE
PNa
 Jt
gt4
Ja
PNmb
Debre Markos

Dejen
P2a
-a

Ja
PNmb
Ja
gt3
gd
Qh
Qh
Nmr
P3a
a
Uolak
Ja
Qb
Na
Qh
Ka
P2a
Ka
Finch
dt
PR2b
gd
ASOSSA 
ARb
gd

PR2b


Ntt
PNmb
  Begi  gt3


ARb
gd
PR2td
Qr
Qh
Qr
Ndb
Jt
P3a
ARl
PR2b
ARl
Ja
gb
dt
PNmb
Ja
gt2
gd
gt2
gd
PR2b
Kajimiti Beds : Metaconglomerate and metasandstone.
PR2a
Dalaha Formation : Fissural basalts and hawaiites with some
intercalated detrital and lacustrine sediments, with rhyolitic
flows and ignimbrites in the upper part.
S
gd
gt3
PR2k
Ndb
P3a
Qh
Qh
Qr
Ntb


Bure
Qh
Qb1
Q
tn
Ja
P3a
PNa
P2a
PNtb
m
o
o
tn
PR2d
dt
gb
gt3
s
bu
Da
Birbir Group : Metabasalt,metaandesite,metarhyolit,phyllite,
graphiticschist,marble,quartzite,metaconglomerate,green
schist,metasandstone,metachert and amphibolite.
Makonnen Basalts:Flood basalts,commonly directly overlaying
the chrystalline basement.
Na
Qb
Qr
Qr
Qh
l
tn
gt3
PNmb

gt4
ARl
Ja Ja
tn
Dura
gb
dt
Mil
Qh
Lake
Ardibo
Duna
gd
gt5
gt3








gd  

PR2b

Tulu Dimtu Group : Metabasalt,metaandesite,green schist,phyllite,
metaconglomerate,quartzite and marble.
PR2b
Arsi and Bale Basalts:Flood basalts often connected to
volcanic edifices,silisic near the upper part.
Qbb
Qb
Na
Qr
P2a
Lake
Hayk
P3a
Ua
cit
PNmb gt3
ARb
Ja
Ja
PNmb
Qh
Qh

e
gd
PR2td
Afar Series : Alkaline basalt with subordinate alkaline and
peralkaline silicics (rhyolitic dome and flows and ignimbrites)
MIDDLE - LATE OLIGOCENE
Qbb
Qr
Qh
Injibara


Gib
gd
gt3
tn
O
S
gd PR2b
dt

PR2td
gt3
P3a
Mota

gt4
tn
gt3
gt2
lo
Beshi
Abay

Qb1
Gala
na
tn
gd
gd
Gizen
PR2b
gb
gd
gt3
Nazret Series : Ignimbrites,unwelded tuffs,ash flows,
rhyolitic flows,domes and trachyte.
Na
Na
Qb
Qh
gt5
Ndb
Gidda
PR2td
gt2
ay
U

gt4
tn
gd
gt3
dt gt2
PR2b
ARb
gd
Kurmuk
tn
PR2b
Ab
D
PR2b
Nn
PNmb
Qh
Qr
Qh
Q
Qr
gt5
Qr
Qr
NQtb

Woldiya
Tis Abay

Q
gt5
Na
PNa
PNtb
gd
Qb
gt5
Qp
D.Tabor
BAHIR DAR
PR2td
gd
Guba

Qbb
P2a
Qr
Qr
Qh
Ndb

Q
Gil
ge
lA
ba
y
ARl
Qb1
P2a
Qr
Qp
Na
gt5
Qbb
Qbt
P2a
Qb
Qh
Ndb
P2a

PNa
Q
Qb1
Q
Qb1
Qbt
L.
Afrrera
Q
Qbt
Qh
Jt
Nrs
Qh
Qh
P2a
gt5
PNtb
P2a
Zemen
Q
Qr
P2a
ze
PNtb
gt3
tn
gt3
Tembien Group : Chlorite, sericite and graphite phyllites,
limestone, slate and dolomite.
Tsaliet Group : Metaandesite, metadacite,metarhyolite.chlorite,
sericite and graphite phyllites,green schist,limestone and quartzite.
OLIGOCENE - MIOCENE
Qb
Qr
gt5
Qr
Jt
Qh
Qb
Qp
PR2l
Qbt
Qr
Qbt
Qh
gt4
gt5
Jt
Nrs
Qp
Qbt
Qb PR2t
Qb
P3a
Ja
gt2


Addis

Lake
Tana
LakeTana
Q
PR2t
Qh
PNa
Teke
P3a
PR2td
gt5
gd
gt4
PR2t
PR2l
E
PR2l
Qbt
gt4
Ja
P3a
PNtb
Ja
Ja
Jt
P2a
PR2d
Nrs
gt4
Jt
Ka
Jt
Lake
Ashenge
Korem

P3a

Q
Ja
Qh
Ja
Sekota
P3a
Q
Ja
Beleghes

Q
P2a
o
Ja
ARb
it
P3a
21.Geological Map of Sololo (Na 37 -2) and Moyale (NA 37-3) Sheets 1:500,000. Priliminary
compilation by G.Sabolovisky,Geology by Rergional Geology Department and Bulbul
Hagere Mariam Project (1990) ,EIGS.
Qp
PR2t
Ja
Ja
Jag
Ja
PR2t
P3a
ar
ell
Ts
20.Geological Map of the Ogaden and surrounding area 1:1,000,000.Compiled BEICIP
(1985)
ARb
Pzt
Pzt
P2a
R
Qh
Jt
Ja
ARb
P3a


dt
Jt
gt3 PR2l PR2t
gt3
P3a
PNtb


Jt
Adigrat
A
Angere
Q
18.Geoloogical Map of Agere Mariam Sheet (NB 37-11) 1 250,000.Compiled by
Woldegebriel Genzebu ,Nassir Hassen and Tesfaye Yemane ,(1990).Published,EIGS.
19.Geological Map of Ngele Sheet (Nb 37-2)1:250,000.Prilimnary comilation by
Tilahun Balcha (1983).Published,EIGS.
Pzt
PR2s
a
PNtb
P2a
17.Geological Map of the 0mo River Area 1:500,000.Geological compilation by
A.Davidson (1985).
Nrs

Q
Ja
PR2d
gd
Qh
Ja Jt
pzt PR2t
L. Asele
PR2s
Qh
Q
PR2l
Qp
PR2l
Nrs
Jt
Ja
pzt
gt4
Q
Nrs
PR2l
Ja

PR2l
gt3 Wukro
Qb
PR2d
gd Ja
Qbt
PR2s
Ka
Qbt
Jag
PR2l
Ka
Jag
Qp
PR2t
Ja
Ja
Jt
P2a
Qbt
Qb
Jt
Jag
ARb
ARb
a
Ghco
Mekele 
Qb
Qh
Jt
Qh
PR2t
gt3
gt4
P3a
pzt Ja
P3a
Ja
part of Ethiopia. Also Cenozoic volcanic and sedimentary rocks
16
Danakil Group (Red Sea Series) : Conglomerate, sandstone,
siltstone with intercalated basalt flows and lacustrine
sediments of the Chorora Formation
Ja
Nad
PR2d
PR2l
Ja
P2a
P3a
Zerim
sa
Ca
15.Geological Map of the Ethipian Rift 1:500,000.Compiled by V.Kazmin and
Seife M.Berhe (!981),Unpublished EIGS.
16.Gological Map of Goba Sheet (NB 37 -7) 1:250,000.Preliminary compilation by
Belay Desta (1985).Unpublished,EIGS.
gt3
Berk
et
Q
pzt

PR2l
PR2l gt4
pzt
gt3
 
Te
ke
ze

14.Geological Map of Nazret Sheet (NC 37-15) 1:250,000.Compiled by Seife M.Berhe
and V.Kazmin,UN supervising geologist (1978),EIGS.
Ja
gt3
Ja
P3a
P3a
pzt
Nad
Adwa
PR2l
Inda Silase

PR2l
P2a
13.Geological Map of Dire Dawa Sheet (NC 37-12) 1:250,000. Compilation by Seife M.Berhe
(1978),EIGS.
gt3
gt3
gt3
gt3
PR2l
12.(a) Geological Map of Gore Sheet (NC 36 -16),1:250,000.Compilation
by Mengesha Tefera and Seife M.Berhe .EIGS.
(b) Geoogy of the Gore Gambela Geotraverse Area,Western Ethiopia 1:100,000
Compiled by J.M.Moore, Teklewold Ayalew and J.M.
A
gt3
PR2d
PR2d
PR2l
PR2l
Jt
Ramis
11.Geological Map of Gimbi Sheet (NC 36-12) 1:250,000.Preliminary draft compilation
by Amenti Abraham (1984) Unpublished .EIGS.
ze
gt3
PR2l
Qp
as
h
Ja
PR2d
PR2l
gt3
Aw

Q
PR2t
gt4
PR2l
gt3
A
gt3
Humera
10.Geological Map of Kurmuk Assossa Sheet (NC 36 -7 & NC 36-8),1:250,000.Compiled
by Mengesha Tefera (1990). Unpublished.EIGS.
tn
Didikama Formation : Slate and dolomite.
MIDDLE - MIOCENE
PR2l
PR2t

gt4 Shiraro
gt3
PR2t
E
9.Geological Map of Abu Ramla Sheet (NC 36 -4 NC 36-8),1:250,000.Compiled by
Alemayehu Gudeya (1989). Unpublished.EIGS.
PNmb
Shiraro Formation : Sandstone and conglomerate.
PR2d
LATE MIOCENE
S
Teke
gt3
PR2l
PR2l
gt3
8.Geological MAp of Ethiopia and Somalia 1:2,000,000 by Meria Gtm,Abate E.,Conti P.,
Segari M.,Tacconi P. (1973).
Q
PR2s
PR2t
PR2s
7.Geological Map of Central and Southern Afar (Ethiopia and Djibouti) ,1:500,000
CNR-CNRS (1975).
PR2b
Alluvial,lacustrine and marine sediments:Conglomerate,
sand,clay,reef,limestone,marl and gypsum.
Dino Formation:Ignimbrite,tuff,course pumice,waterlain
pyroclastic rocks with rare intercalations of lacustrine sediments.
T
gt3
6.Geological Map of the Danakil Depression (Northern Afar,Ethiopia) 1:50,000 CNR-CNRS
(1973).
Qp
Qd
A
2.Geological Map of Adigrat Sheet (ND 37 -7),1:250,000.Compilation by C.R.Garland
(1972). Recompilation with ERTS data by V. Kazmin (1976) EIGS.
Mursi and Bofa Basalts : Alkaline basalt
Chilalo Formation(Upper part) : Alkaline basalt
Chilalo Formation(Lower part) : Trachyte,trachy- basalt,
peralkaline rhyolite with subordinate akaline. basalt.
PLEISTOCENE
OF
I
1.Geological Map of Ethiopia,1:2,000,000. Compiled by V.Kazmin (UN) 1972,MME.
Upper Proterozoic : Undifferentiated.
Nb
MIOCENE - PLIOCENE
Hawaiite,mugearite,trachyte,andesine basalt and ferrobasalt.
L
LATE PROTEROZOIC
PR2
Ncb
Nc
Nrs
Undifferentiated alluvial,lacustrine and beach sediments.
Qbt
NN
A
3.Gological Map of Adirametse Sheet (ND 37 -9) 1:250,000.Geology compilation
by Abera Aguma and Girma Kebede (1974-1976).EIGS.
o
Rhyolitic volcanic centers,obsidian pitchstone,pumice,ignimbrite,tuff,
subordinate trachytic flows (predominantly peralkaline in composition)
Ghinir Formation :Rhyolite with subordinate basalt
HOLOCENE
M
Undivided Lacustrine and Fluvial Sediments : Sand, silt gravel
conglomerate(Omo Group and Hadar Formation) .
NQ
continental and marine sediments occur mainly in the eastern
Enticho Sandstone, Edaga Arbi Glacials,Gura and Gilo Formations:
Sandstone, shale, conglomerate and tillite.
Pzt
Bishoftu Formation : Alkaline basalt and trachyte.
Plateau Basalt:Alkaline basalt and trachyte
Qg
A 6°
I
A
18
20
NOtb
Basalt flows,spatter cones and hyaloclastites
a) Transitional type between alkaline and tholeiitic.
b) Alkaline olivine basalt.
b
b
Qb1
1
UGANDA
Qb
A
L
D
17
M
major geological terrains. Late Palaeozoic, Mesozoic and Cenozoic
LATE PALEOZOIC - TRIASSIC
PLIOCENE - PLEISTOCENE
Alluvial and lacustrine deposits:Sand,silt,clay,
diatomite,limestone and beach sand.
Qr
16
4°
QUATERNARY UNDIFFERENTIATED
Q
Geology of Ethiopia
Ethiopia has a complex geological history represented in three
80 miles
LEGEND
1
o
6°
12°
10°
1
14
15
16
O
13
12
1
N
D
D
JI
B
GULF
10°
8°
EDE
OF
E
7
8
TI
80 kms.
40
R
12°
9
40
0
A
6
10
0
14°
5
I
3
A
I
D
A
R
D
U
16°
E
E
o
46°
46°
L
44°
42°
1
14°
10
o
A
40°
38°
16°
12
48
18
36°
34°
14
o
o
M
18
44
o
46
o
48
o
o
Ethiopian Ministry of Mines
Geological Survey of Ethiopia
D
N
K
9
12
11
10
36°
E
36°
17
3
N
15
4
R
18
8
1
38°
E
38°
21
Y
1
I
1
40°
19
16
14
5
T
40°
A
R
13
7
6
E
42°
A
42°
20
1
TI
44°
S
O
44°
M
A
F
GUL
L
OF
46°
M
46°
2.Geological Map of Adigrat Sheet (ND 37 -7),1:250,000.Compilation by C.R.Garland
(1972). Recompilation with ERTS data by V. Kazmin (1976) EIGS.
A
21.Geological Map of Sololo (Na 37 -2) and Moyale (NA 37-3) Sheets 1:500,000. Priliminary
compilation by G.Sabolovisky,Geology by Rergional Geology Department and Bulbul
Hagere Mariam Project (1990) ,EIGS.
20.Geological Map of the Ogaden and surrounding area 1:1,000,000.Compiled BEICIP
(1985)
19.Geological Map of Ngele Sheet (Nb 37-2)1:250,000.Prilimnary comilation by
Tilahun Balcha (1983).Published,EIGS.
18.Geoloogical Map of Agere Mariam Sheet (NB 37-11) 1 250,000.Compiled by
Woldegebriel Genzebu ,Nassir Hassen and Tesfaye Yemane ,(1990).Published,EIGS.
17.Geological Map of the 0mo River Area 1:500,000.Geological compilation by
A.Davidson (1985).
15.Geological Map of the Ethipian Rift 1:500,000.Compiled by V.Kazmin and
Seife M.Berhe (!981),Unpublished EIGS.
16.Gological Map of Goba Sheet (NB 37 -7) 1:250,000.Preliminary compilation by
Belay Desta (1985).Unpublished,EIGS.
14.Geological Map of Nazret Sheet (NC 37-15) 1:250,000.Compiled by Seife M.Berhe
and V.Kazmin,UN supervising geologist (1978),EIGS.
10°
12°
14°
16°
46°
46°
4°
A 6°
13.Geological Map of Dire Dawa Sheet (NC 37-12) 1:250,000. Compilation by Seife M.Berhe
(1978),EIGS.
12.(a) Geological Map of Gore Sheet (NC 36 -16),1:250,000.Compilation
by Mengesha Tefera and Seife M.Berhe .EIGS.
(b) Geoogy of the Gore Gambela Geotraverse Area,Western Ethiopia 1:100,000
Compiled by J.M.Moore, Teklewold Ayalew and J.M.
11.Geological Map of Gimbi Sheet (NC 36-12) 1:250,000.Preliminary draft compilation
by Amenti Abraham (1984) Unpublished .EIGS.
10.Geological Map of Kurmuk Assossa Sheet (NC 36 -7 & NC 36-8),1:250,000.Compiled
by Mengesha Tefera (1990). Unpublished.EIGS.
9.Geological Map of Abu Ramla Sheet (NC 36 -4 NC 36-8),1:250,000.Compiled by
Alemayehu Gudeya (1989). Unpublished.EIGS.
8.Geological MAp of Ethiopia and Somalia 1:2,000,000 by Meria Gtm,Abate E.,Conti P.,
Segari M.,Tacconi P. (1973).
7.Geological Map of Central and Southern Afar (Ethiopia and Djibouti) ,1:500,000
CNR-CNRS (1975).
6.Geological Map of the Danakil Depression (Northern Afar,Ethiopia) 1:50,000 CNR-CNRS
(1973).
5.Geological Map of Mekele Sheet (ND 37-11), 1:250,000.Geology compilation
by Y.Arkin et.al. (1968-1971),EIGS.
4.Gological Map of Adiarkay Sheet (ND 37 -10) 1:250,000.Preliminary compilation
by Tsegaye Hailu (1975) ,EIGS.
3.Gological Map of Adirametse Sheet (ND 37 -9) 1:250,000.Geology compilation
by Abera Aguma and Girma Kebede (1974-1976).EIGS.
I
N
EDE
Dino Formation:Ignimbrite,tuff,course pumice,waterlain
pyroclastic rocks with rare intercalations of lacustrine sediments.
Alluvial,lacustrine and marine sediments:Conglomerate,
sand,clay,reef,limestone,marl and gypsum.
PLEISTOCENE
Hawaiite,mugearite,trachyte,andesine basalt and ferrobasalt.
Undifferentiated alluvial,lacustrine and beach sediments.
HOLOCENE
Ghinir Formation :Rhyolite with subordinate basalt
Rhyolitic volcanic centers,obsidian pitchstone,pumice,ignimbrite,tuff,
subordinate trachytic flows (predominantly peralkaline in composition)
Plateau Basalt:Alkaline basalt and trachyte
Basalt flows,spatter cones and hyaloclastites
a) Transitional type between alkaline and tholeiitic.
b) Alkaline olivine basalt.
1.Geological Map of Ethiopia,1:2,000,000. Compiled by V.Kazmin (UN) 1972,MME.
UGANDA
34°
A
4°
1
SU
6°
8°
10°
12°
14°
34°
Qd
Qp
Qbt
Qh
Qg
Qr
Qb1
b
b
N
Qb
Alluvial and lacustrine deposits:Sand,silt,clay,
diatomite,limestone and beach sand.
A
D
16°
a
U
S
QUATERNARY UNDIFFERENTIATED
O
U
D
JI
B
Q
O
A
S
E
I
S
L
D
A
R
E
80 miles
Tulu Wolel Trachyte with subordinate basalt.
Ntt
Mabla and Arba Guracha Formation : Rhyolitic domes,flows and
pyroclastic rocks of dominantly peralkaline composition with
subordinate trachyte and basalt flows interstratified at base.
Teltele and Surma Basalt : Flood basalts.
Adwa Formation : Trachyte and phonolite plug.
Nmr
Nts
Nad
PNa
PNtb
Pt
Ferfer Formation:Albabian-Cenomanian shale,dolomite and anhydrite.
Kf
Korahe Formation (Main Gypsum Formation) : (Neocomian/Barremian)
Upper Korahe (Kg2) gypsum, shale, dolomite and anhydrite intercalation
Lower Korahe (Kg1) shale and limestone with basal sandstone.
Hamanlei Formation : Oxfordian limestone and shale.
Adigrat Formation : Triassic-Middle Jurassic sandstone.
Jh
Ja
EARLY - LATE JURASSIC
Abay Formation : Middle-Jurassic limestone,shale and gypsum.
a) Urandab Formation (Ju) : Oxfordian-Kmmerdgian marl and shaly limestone
b) Antalo Formation (Jt) : Limestone.
Agula Formation :Kimmeridgian shale,marl and limestone.
Gabredarre Formation : Kimmeridgia -Tithonian ; (Jg2) Upper unit and (Jg1)
Lower unit :Limestone with shaly and gypsiferous units.
LATE JURASSIC
Jt
Jb
Ju
Jag
Jg1
Jg2
Kg1
Kg2
Mustahil Formation:Aptian-Albian limestone,marl and sandstone.
Belet Uen Formation:Late Cretaceous (Cenomanian -Turonian)
limestone with some sandstone and shale.
Kb
Km
Amba Aradom Formation:Sandstone,
conglomerate and shale.
CRETACEOUS
Jessoma Formation:Late Cretaceous-Paleocene sandstone.
Ka
Pj
Auradu Formation:Late Paleocene-Early Eocene limestone.
Taleh Formation:Erly-Middle Eocene:Anhydrite,gypsum,
dolomite and clay
Pk
Pa
Karkar Formaytion : Middle-late Eocene limestone with
marly intercalations.
P2a
EOCENE
Jimma Volcanics (Upper part) : Rhyolite and trachyte flows and tuff with minor basalt
Jimma Volcanics (Lower part) : Flood basalt with minor salic flows.
LATE EOCENE - LATE OLIGOCENE
Aiba Basalts:Flood basalts with rare basic tuff.
Ashangi Formation: Deeply weathered alkaline and trasitional basalt
flows with rare intercalations of tuff,often tilted (includes Akobo
Basalts of SW Ethiopia).
Pjr
Pjb
P3a
MIDDLE - LATE OLIGOCENE
PNab
Arsi and Bale Basalts:Flood basalts often connected to
volcanic edifices,silisic near the upper part.
Makonnen Basalts:Flood basalts,commonly directly overlaying
the chrystalline basement.
Alage Formation : Transitional and subalkaline basalts with minor
rhyolite and trachyte eruptives.
Tarmaber Gussa Formation : Alkaline to transitional basalts
often forming shield volcanoes with minor trachyte and phonolite flows
OLIGOCENE - MIOCENE
Tarmaber Megezez Formation : Transitional and alkaline basalt.
Ntb
MIDDLE - MIOCENE
Dalaha Formation : Fissural basalts and hawaiites with some
intercalated detrital and lacustrine sediments, with rhyolitic
flows and ignimbrites in the upper part.
Ndb
LATE MIOCENE
Wadera Group : Metasandstone,quartzite,biotite and muscovite schists.
Mormora Group : Biotite schist,gneiss,marble and graphitic schist.
gb
dt
tn
gd
Konso Group : Hornblende, pyroxene,garnet - pyroxene gneisses
and amphibolite with minor metasedimentary gneiss.

Antiform
Synform
Anticline : upright,overturned
Syncline : upright,overturned
Major plugs or group of small plugs
Basic dykes and sills
Caldera
Field of small basaltic vents
Other major volcanic edifices
Shield volcano of the Ethiopian Plateau.
Fault barb on downthrown side.
Faults : observed,inferred.
Geological contact : observed,inferred.
OTHER SYMBOLS
Gabbro
Diorite
Tonalite
Granodiorite.
Granodiorite and tonalite.
Pre - tectonic and syn - tectonic granite.
Syn - tectonic granite.
Late Proterozoic Ultramafic Rocks : Serpentinite, peridotite
dunite and talc schists.
Late to post - tectonic granite.
Post - tectonic granite and syenite.
Alkali granite and syenite.
PRECAMBRIAN AND PHANEROZOIC INTRUSIVE ROCKS
gd / tn
gt1
gt2
gt3
gt4
gt5
ARk
Alghe Group : Biotite and hornblende gneisses,granulite and
migmatite with minor metasedimentary gneisses.
Awata Group : Biotite, hornblende,sillimanite - garnet,calc - sillicate
and quartzo - feldspathic gneisses,marble and granulite.
ARa
ARl
Yavello Group : Quartzo - feldspathic gneiss and granulite.
ARy
Baro Group : Biotite,hornblende - biotite,garnet - amphibole,
garnet - sillimarite,calc - silicate and muscovite gneisses.
ARCHEAN
PR1w
PR1r
ARb
Adola Group : Amphibolite,quartzite and graphitic phyllite.
EARLY PROTEROZOIC
PR2a
Kajimiti Beds : Metaconglomerate and metasandstone.
PR2k
Afar Series : Alkaline basalt with subordinate alkaline and
peralkaline silicics (rhyolitic dome and flows and ignimbrites)
Na
Tulu Dimtu Group : Metabasalt,metaandesite,green schist,phyllite,
metaconglomerate,quartzite and marble.
Birbir Group : Metabasalt,metaandesite,metarhyolit,phyllite,
graphiticschist,marble,quartzite,metaconglomerate,green
schist,metasandstone,metachert and amphibolite.
PR2td
Nazret Series : Ignimbrites,unwelded tuffs,ash flows,
rhyolitic flows,domes and trachyte.
Nn
Tsaliet Group : Metaandesite, metadacite,metarhyolite.chlorite,
sericite and graphite phyllites,green schist,limestone and quartzite.
Tembien Group : Chlorite, sericite and graphite phyllites,
limestone, slate and dolomite.
Didikama Formation : Slate and dolomite.
PR2b
PR2l
Danakil Group (Red Sea Series) : Conglomerate, sandstone,
siltstone with intercalated basalt flows and lacustrine
sediments of the Chorora Formation
PR2t
Nrs
MIOCENE - PLIOCENE
PR2d
Chilalo Formation(Upper part) : Alkaline basalt
Chilalo Formation(Lower part) : Trachyte,trachy- basalt,
peralkaline rhyolite with subordinate akaline. basalt.
Shiraro Formation : Sandstone and conglomerate.
Upper Proterozoic : Undifferentiated.
LATE PROTEROZOIC
Enticho Sandstone, Edaga Arbi Glacials,Gura and Gilo Formations:
Sandstone, shale, conglomerate and tillite.
LATE PALEOZOIC - TRIASSIC
Ncb
Nc
PR2
Pzt
PR2s
Undivided Lacustrine and Fluvial Sediments : Sand, silt gravel
conglomerate(Omo Group and Hadar Formation) .
Bishoftu Formation : Alkaline basalt and trachyte.
80 kms.
Mursi and Bofa Basalts : Alkaline basalt
PNmb
Jg
LEGEND
40
40
Nb
NQ
0
PLIOCENE - PLEISTOCENE
NOtb
0
GEOLOGICAL MAP
OF
ETHIOPIA