Historical Geology Understanding Our Planet\'s Past

Conglomerate Conglomerate

Conglomerate Conglomerate

Conglomerate

Conglomerate

Conglomerate

Conglomerate

ConglomerateConglomerateConglomerate

Conglomerate

ConglomerateConglomerateConglomerate

Conglomerate Conglomerate

Conglomerate ConglomerateConglomerate

Kaibab limestone

Toroweap formation

Hermit Shale

Redwall limestone

Temple Butte limestone

Muav limestone

Bright Angel shale

Tapeats sandstone

Dox sandstone

Vishnu schist Granite Vishnu schist

pegmatites

Shinumo quartzite

Hakatai shale

Base limestone

Esplanade sandsone

Wescogame formation

Manakacha formation

Watahomigi formation

SUPAI

GROUP

Cedar Mountain

Chinle formation

Kaibab limestone

Toroweap formation

Coconino sandstone

Hermit shale

Redwall limestone

Temple butte limestone

Muav limestone

Bright angel shale

Tapeats sandstone

Dox sandstone

Vishnu schist Vishnu schist

Inner gorge

Tonto platform

Brachiopods, hyolithids, eocrinoids,

trilobites, ostracodes

Foraminifers, corals, bryozoans,

gastropods, pelecypods, cephalopods

blastoids, crinoids, fish

Foraminifera, including fusulinids,

corals, bryozoans, brachiopods,

gastropods, pelecypods, conodonts, fish

Esplanade platform

1,000

750

500

250

0

Feet

Colorado

River

Granite

pegmatites

Shinumo quartzite

Hakatai shale

Base limestone

Esplanade sandstone

Wescogame formation

Manakacha formation

Watahomigi formation

SUPAI

GROUP

Moenkopi

formation

Triassic

Permian

Pennsylvanian

Mississippian

Devonian

Cambrian

PRECAMBRIAN

PALEOZOIC

MESOZOIC

Figure 183A cross section of the Grand Canyon.