63b
Kaolinitic clay, clay, clay sand, lignite
Evens Strait Fm.
PHANEROZOIC
MESOZOIC
CRETACEOUS AND JURASSIC
LOWER CRETACEOUS AND MIDDLE JURASSIC
59g
Limestone, dolostone, shale
Moose River Fm.
PALEOZOIC
DEVONIAN
MIDDLE DEVONIAN
59h
Kwataboahegan Fm.
58b
Sandstone, dolostone, limestone
Stooping River Fm.
LOWER DEVONIAN
57d
Sandstone, shale, dolostone, siltstone
Kenogami River Fm. (Upper Silurian to Lower Devonian)
SILURIAN
UPPER SILURIAN
56g
Attawapiskat Fm.
MIDDLE AND LOWER SILURIAN
56h
Ekwan River Fm.
56i
Severn River Fm.
55d
Shale, limestone, dolostone, siltstone
Red Head Rapids Fm.
ORDOVICIAN
UPPER ORDOVICIAN
55e
Churchill River Gp.
55f
Bad Cache Rapids Gp.
15
Massive granodiorite to granite
massive to foliated granodiorite to granite
ARCHEAN
NEO-TO MESOARCHEAN (2.5 to 3.4 Ga)
Superior
Granulite grade units may be shown by screened overprint. Rocks in these groups are subdivided lithologically. The order does not imply age relationship within or among group.
26a
Mafic intrusive rocks
Molson swarm (1884 Ma): diabase dikes; and Sutton Inlier diabase sills
PROTEROZOIC
PALEOPROTEROZOIC (1.6 to 2.5 Ga)
Southern and Superior
A generalized distribution of diabase dikes is shown.  Some individual swarms occur in more than one geological province.
11
Gneissic tonalite suite
tonalite to granodiorite-foliated to gneissic-with minor supracrustal inclusions
14
Diorite - monzonite - granodiorite suite
diorite, tonalite, monzonite, granodiorite, syenite and hypabyssal equivalents (saturated to oversaturated suite)
12
Foliated tonalite suite
tonalite to granodiorite-foliated to massive
5
Mafic to intermediate metavolcanic rocks
basaltic and andesitic flows, tuffs and breccias,  related migmatites
Rocks in these groups are subdivided lithologically. The order does not imply age relationship within or among group. This unit was formerly classified as Keewatin. Most of these sequences range in age from 2.7 Ga to 2.8 Ga based on U/Pb zircon ages.
10
Mafic and ultramafic rocks
gabbro, anorthosite, ultramafic rocks
6
Felsic to intermediate metavolcanic rocks
rhyolitic, rhyodacitic, dacitic and andesitic flows, tuffs and breccias related migmatites
25
Sedimentary Rocks (Sutton Inlier)
dolostone, chert breccias, argillite, wacke, conglomerate, iron formation
24
Sedimentary Rocks (Animikie Group)
wacke, shale, iron formation, limestone, minor volcanic rocks, conglomerate, taconite, aldal chert, carbonate rocks, argillite-tuff
7
Metasedimentary rocks
wacke, siltstone, arkose, argillite, slate, marble, chert, iron formation, minor metavolcanic rocks,conglomerate, arenite, paragneiss, migmatites
9
Coarse clastic metasedimentary rocks
mainly coarse clastic metasedimentary rocks, with minor, mainly alkalic, mafic to felsic metavolcanic flows, tuffs and breccias
NEO-ARCHEAN (2.5 to 2.9 Ga)
These rocks are referred to as “Timiskaming” in the Abitibi subprovince of the Superior province.
9b
Alkaline metavolcanic rocks: mafic to felsic metavolcanic flows, tuffs and breccias
9a
Metasedimentary rocks: conglomerate, arkose, arenite, wacke, sandstone, siltstone, argillite
13
Muscovite - bearing granitic rocks
muscovite-biotite and cordierite-biotite granite, granodiorite-tonalite
15a
Potassium feldspar megacrystic units
7c
marble, chert, iron formation, minor metavolcanic rocks
8
Migmatized supracrustal rocks
metavolcanic rocks, minor metasedimentary rocks, mafic gneisses of uncertain protolith, granitic gneisses
1
Metasedimentary rocks and mafic to ultramafic metavolcaic rocks
coarse clastic metasedimentary rocks, marble, quartz arenite, iron formation, komatiite, mafic metavolcanic rocks, and minor felsic metavolcanic rocks
MESOARCHEAN (2.9 to 3.4 Ga)
This unit was formerly classified as Keewatin. Most of these sequences range in age from 2.7 Ga to 2.8 Ga based on U/Pb zircon ages. This unit comprises those greenstone sequences in which shallow-water supermature sediments (quartz arenites, shallow wat
3
Mafic metavolcanic and metasedimentary rocks
mafic metavolcanic rocks, minor iron formation
This unit was formerly classified as Keewatin. Most of these sequences range in age from 2.7 Ga to 2.8 Ga based on U/Pb zircon ages.
2
rhyolitic, rhyodacitic, dacitic and andesitic flows, tuffs and breccias
16
Hornblendite - nepheline syenite suite
pyroxenite, diorite, monzonite, syenite, nepheline syenite, foid-bearing syenite (saturated to undersaturated suite)
NEOARCHEAN (2.5 to 2.9 Ga)
Rocks in these groups are subdivided lithologically. The order does not imply age relationship within or among group
35
Carbonatite - alkalic intrusive suite (1.0 to 1.2 Ga)
carbonatite, nepheline syenite, alkalic syenite, ijolite, fenite; associated mafic and ultramafic rocks
MESOPROTEROZOIC (0.9 to 1.6 Ga)
4b
Mafic to ultramafic metavolcanic rocks
mafic metavolcanic rocks metasedimentary rocks and pyroclastic rocks
1b
mafic metavolcanic rocks, marble, quartz arenite, iron formation
14a
diorite, monzonite, quartz monzonite
59e
Williams Island Fm.
7e
Paragneiss andmigmatites
58c
Sextant Fm.
10c
ultramafic rocks
10a
gabbro
60b
Shale
Long Rapids Fm.
UPPER DEVONIAN
59f
Murray Island Fm.
63a
Mattagami Fm, :Mistuskwia Beds
34a
Mafic and related intrusive rocks (Keweenawan age)
Logan and Nipigon sills (1109 Ma): diabase sills
4
mafic metavolcanic rocks with minor komatiite, metasedimentary and pyroclastic rocks
7d
conglomerate and arenite
23c
Mafic and related intrusive rocks
Kenora-Fort Frances swarm: diabase dikes
4a
Ultramafic metavolcanic rocks
6b
rhyolitic, rhyodacitic flows, tuffs and breccias
38
Carbonatite - alkalic intrusive suite (450 to 600 Ma)
carbonatite, nepheline syenite, alkalic syenite, ijolite, fenite; associated mafic and ultramafic intrusions
EARLY PALEOZOIC TO NEOPROTEROZOIC (0.45 to 0.9 Ga)
7a
wacke, siltstone, arkose
10b
anorthosite
16c
syenite, nepheline and/or foid-bearing syenite
31
Sibley Gp.
conglomerate, sandstone, shale
30a
Felsic intrusive rocks
Grantic, alkali granite, granodiorite, quartz feldspar porphyry; minor related volcanic rocks (1.4 to 1.5 Ga)
MESO-TO PALEOPROTEROZOIC (0.9 to 2.5 Ga)
27
Carbonatite - alkalic intrusive suite (ca. 1.9 Ga)
carbonatite, nepheline syenite, alkalic syenite, ijolite, fenite; associated mafic and ultimafic rocks
34e
Abitibi swarm (1141 Ma): diabase dikes
6a
dacitic and andesitic flows, tuffs and breccias
24a
Rove Formation: argillite, shale, wacke, minor volcanic rocks
5b
basaltic and andesitic flows, tuffs and breccias
32
Osler Gp., Mamainse Point Fm., Michipicoten Island Fm.
basalt, conglomerate, arkose, rhyolite, quartz feldspar porphyry
34b
Pigeon River and Pukaskwa swarms: diabase dikes
5a
Andesitic flows, tuffs and breccias with minor rhyolites
14b
granodiorite, granite
32a
Basalt and associated conglomerate and arkose
33b
Sudbury swarm (1141 Ma): diabase dikes
34d
Felsic to intermediate intrusive rocks
24b
Gunflint Formation: conglomerate, taconite, algal chert, chert, carbonate rocks, argillite-tuff
34
diabase dikes and sills, ultramafic, gabbroic, granophyric and felsic to intermediate intrusive rocks
21
Cobalt Group
siltstone,argillite, sandstone, conglomerate
33
diabase dikes
21d
Gowganda Formation: conglomerate, sandstone, siltstone, argillite
7b
argillite, slate, mudstone
34c
Ultramatic, gabbroic and granophyric intrusions
14c
syenite
23d
Nipissing sills (2219 Ma): diabase sills, dikes and related granophyre
23a
Preissac swarm: diabase dikes
55
56
21c
Lorrain Formation: quartz sandstone, minor conglomerate, siltstone
32b
Rhyolite, quartz feldspar porphyry; associated conglomerate and arkose
36
Jacobsville Gp.; Oronto Gp.
sandstone, shale, conglomerate
21b
Gordon Lake Formation: siltstone, argillite, sandstone
21a
Bar River Formation: quartz sandstone, hematitic sandstone, sandstone
20c
Quirke Lake Group
Bruce Formation: conglomerate with minor sandstone and siltstone
19a
Hough Lake Group
Mississagi Formation: quartz-feldspar sandstone, argillite and conglomerate
41
Migmatitic rocks and gneisses of undetermined protolith
commonly layered biotite gneisses and migmatites; locally includes quartzofeldspathic gneisses, orthogneisses, paragneisses
NEO-TO MESOPROTEROZOIC (0.57 to 1.6 Ga)
Grenville
Central Gneiss Belt
20b
Espanola Formation: limestone, dolostone, siltstone, sandstone
20a
Serpent Formation: quartz-feldspar sandstone, sandstone with minor siltstone, calcareous siltstone and conglomerate
20
sandstone, siltstone, conglomerate, limestone, dolostone
17b
Mafic and ultramafic intrusive rocks
Gabbro, anorthosite
37a
Grenville swarm (~575 Ma): diabase dikes
37c
Gabbro, diorite, ultramafic rocks, granophyre
43
Felsic igneous rocks
tonalite, granodiorite, monzonite, granite, syenite; derived gneisses
39
Gneisses of metasedimentary origin
quartzofeldspathic gneisses, pelitic to semi-pelitic gneisses, calc-silicate gneisses, minor quartzite, minor marble and marble breccia
42
Anorthosite and alkalic igneous rocks
anorthosite, anorthositic gabbro, gabbro and related gneisses, nepheline syenite, alkalic syenite
29b
Sudbury Igneous Complex
Norite-gabbro, quartz norite, sublayer and offset rocks
29a
Granophyre
28c
Whitewater Gp.
Onaping Formation: lapilli tuff, breccia, felsic flows and intrusions, minor carbonate and cherty
18c
Elliot Lake Group
Volcanic rocks: includes mafic, intermediate and felsic metavolcanic rocks, intercalated metasedimentary rocks and epiclastic rocks
18b
Matinenda Formation: quartz feldspar sandstone, conglomerate, sandstone
28b
Onwatin Formation: carbonaceuos slate
28a
Chelmsford Formation: wacke, minor siltstone
40
Mafic rocks
amphibolite, gabbro, diorite, mafic gneisses
18a
McKim Formation: siltstone, wacke, argillite
19c
Ramsay Lake Formation: conglomerate, minor sandstone, siltstone
19b
Pecors Formation: siltstone, argillite, wacke, minor sandstone
19
siltstone, wacke, argillite, quartz-feldspar sandstone, conglomerate, sandstone
30b
Killarney monzogranite and granite rocks (1.7 and 1.4 Ga)
52
Conglomerate, sandstone, shale, dolostone
Potsdam Gp.; Nepean Fm.; Covey Hill Fm.
CAMBRIAN
53
Dolostone, sandstone
Beekmantown Gp.
LOWER ORDOVICIAN
54a
Limestone, dolostone, shale, arkose, sandstone
Ottawa Gp.; Simcoe Gp.; Shadow Lake  Fm
MIDDLE ORDOVICIAN
55b
Georgian bay Fm.; Blue Mountain Fm.; Billings Fm.; Collingwood Mb.; Eastview Mb.
55a
Queenston Fm.
56d
Clinton Gp.; Cataract Gp.
51
Tectonite
tectonites, straight gneisses, porphyroclastic gneisses, unsubdivided gneisses in major deformation zones, mylonites, protomylonites
56c
Amabel Fm.
56b
Lockport Fm.
56a
Guelph Fm.
44
Mafic to felsic metavolcanic rocks
flows, tuffs, breccias, minor iron formation, minor metasedimentary rocks; includes reworked pyroclastic units, amphibolite
Central Metasedimentary Belt
48
Alkalic plutonic rocks
nepheline syenite, alkalic syenite, fenite; associated mafic, ultramafic and carbonatitic rocks
49
Mafic to ultramafic plutonic rocks
diorite, gabbro, peridotite, pyroxenite, anorthosite, derived metamorphic rocks
47
Early felsic plutonic rocks
granodiorite, tonalite, trondhjemite, monzogranite, syenogranite; derived gneisses and migmatites
46
Carbonate metasedimentary rocks
marble, calc-silicate rocks, skarn, tectonic breccias
54b
Chazy Gp., Rockcliffe Fm.
45
Clastic metasedimentary rocks
conglomerate, wacke, quartz arenite, arkose, limestone, siltstone, chert, minor iron formation, minor metavolcanic rocks
50
Late felsic plutonic rocks
granodiorite, granite, syenite, pegmatite, alkalic granite, migmatitic gneisses
50a
granitic and syenitic gneisses
57c
Salina Fm.
57a
Bass Island Fm.
58a
Bois Blanc Fm.; Oriskany Fm.
59d
Detroit River Gp.; Onondage Fm.
59c
Dundee Fm.
59a
Hamilton Gp.
60a
Kettle Point Fm.
57b
Bertie Fm.
61
Shale: Port Lambton Gp.
MISSISSIPPIAN TO DEVONIAN
59b
Marcellus Fm.