No.

Code

Description of Geologic class

Quaternary Volcanics and Sediments

1

Q

Undivided alluvium, eluvium and lacustrine sediments

2

Qa

Alluial deposits: Gravel, sand silt and clay

3

Qe

Eluvium: Red to reddish brown sandy soil black cotton soil calcrite, minor ferricrite, silt clay

4

Qv6

Augite-olivine-phyric basalt, scoraceous-vesicular with xenoliths of mantle nodules

5

Qv5

Pyroclastic surge deposits: Lapilli tuff

6

Qv4

Olivine-phyric-basalt

7

Qv3

Pyrocalistic surge deposits: Lapilli tuff

8

Qv2

Augite-abradorite-lapilli tuff

9

Qv1

Pyrcasitic surge deposits: Mainly bedded fall deposits scoria, rock fragments

10

Qv

Scoraceous-vesicular-oilivine-phyric basalt

Tertiary Volcanic Sucessions

11

Nn

Nazeret Group: Stratoid silics-ignimbites, tuffs, ash, rhyolites, trachye, minor basalt

12

Ntr3

Alkal trachyte flows

13

Ntr2

Alkali trachyte and basalt flows

14

Nb

Bulal Basalt flows

15

NMv

Upper basal flows

16

PNtr1

Alkali trachyte and basalt flows, rhyolitic ignimbrite, minor tuff and bassal flows

17

NMt

Teltele basalt flows

18

PNi

Ignimbrite, minore tuff and bassalt

19

PNb2

Ankaramite and minor divine-phyric basalt

20

PNb1

Lower flood basalts

21

Tsy

Hornblende-Alkali syenite, minor hornblende-nepheline syenite

Mesozoic Sedimentary Successions

22

Ka

Amba Aradam formation: Varicoloured sandstones with inter beddding

23

Km

Mustahil formation: Limestones inerbedded with shales and marls

24

Kg2

dominantly gypsum and anhydraites with beds of limestones, shales, marl and iron carbonate rock

25

Kg1

Korahe formation: Lower unit dominantly sandstones with bes of dolomites, limestones marl, shale, gypsum and anhydrites

26

Jg

Gabredarre formation: Micritic to microcrysaline and oolitic limestones

27

Jh2

Hamanlei formation: Micritic locally oolitic (grainstone) peletic limestones

28

Jh1

Hamanlei formation: Less fossiliferous limestones with beds of calcareous sandstone

29

Ja

Adigrat formation: Variegated quatzos sanstones, intercalations of siltstones, shales and intrafomational conglomerates

Precambrean-Early Paleozoic Basement Cmplexes

30

pcgt2

Blotite and homblende granites

31

pcdt

Meta-quartz diorite plutonic bodies

32

pcgb1

Metagabbro

33

pcgd

Metagranodiorite

34

pcgt1

Biotite metagranite

35

pcdt2

Quartz metadiorite

36

pcdt1

Melka Guga diorite gneiss

Mafic-Ultramafic-Volcano-Sedimentary Assemblages

37

pckb

Kajimiti Beds: Metasandstone and metaconglomerate

38

pcsc3

Metasediments: philite, metasiltstone melasandstone, micaschists, quartz-graphite-muscovite, kyanite-muscovit schists

39

pcsc2

Metavolcanics: Amhibotite and plagioclase-chlorite-actinitit schist

40

pcsc1

Subvolcanic amphibolite

41

pcum2

Metaomblendite

42

pcgb2

Metagabbro

43

pcum4

Talc, tremolite-Chiorite-talc, chlorite, chlorite-actindite and actinolite schists

44

pcum3

Serpentinite

45

pcum1

Undeferentiated metaltramafics

Gneissic and Migmataitic Complexes

46

pcgn11

Quartz-graphite schist, minor marble and quartz-sericite schist

47

pcgn10

Biotite-microline-quartz and gamet-staurolite-gneises and amphibolite

48

pcgn9

Biotite-quartz-oligoiase gneiss, amphibolite and digoclase-quartz-microcline gneiss

49

pcgn8

Strongly migmatized-bioite-quartz-felspar gneiss(paragneisses)

50

pcgn7

Oligoclase-hornblende-biotite-quartz, biotite-hornblende, biotite and calcsilicate

51

pcgn6

Quartzofeldspathic gneiss, minor biotitie-feldspar-quartz gneiss and biotite granite pods

52

pcgn5

Magetite-quartzofeldspathic gneiss

53

pcgn4

wadera mylonite and mylonitic gneiss

54

pcgn3

Hornblende-biotite-quartz-feldspar and biotite-quartz-feldspar gneisses

55

pcgn2

Biotite-hornblende gneiss

56

pcgn1

Granulite-quartzofeldspathic gneiss