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South Cental Idaho - Malta


Period
 Formation / Members  Thick-  ness Rock Type

QUAT

Alluvium, Colluvium

0-100

 

Glacial deposits, Albion Mts

0-50

 

Snake River Basalt Group

0-200

 

Raft Formation

0-300

 

PLIOCENE

Salt Lake Fm

Upper basin fill

0-300

 

Upper tuffaceous mbr

0-4000

 

MIOCENE

Basalt of N. Cotterel Mt

0-100

 

Jim Sage Volc Mbr

3300

 

Lower tuffaceous mbr

600-1500

 

OLIGO

Almo granitic pluton

pluton

 

TRIASSIC

Dinwoody Formation

slice

 

PERMIAN

Rex Chert Mbr, Phosphoria Fm

slice

 

PENN

Oquirrh group

Sandy limestone

0-500

 

West Canyon Ls

0-200

 

MISS

Manning Canyon Phyllite

0-200

 

ORD

Metamorphosed Fish Haven Dol

0-50

 

Metamorphosed Eureka Qtzt

0-50

 

Metamorphosed Pogonip Group

0-1000 ?

 

CAMB

Schist of Mahogany Peaks or Quartzite of Thompson Flat

0-300

 

Qtzt of Clarks Basin

0-200

 

pC (ARCH)

Schist of Stevens Spring

100-500

 

Quartzite of Yost

0-100

 

Schist of Upper Narrows

200-600

 

Elba Quartzite

200-700

 

Green Creek Complex 2500 m.y. K-Ar

NULL