The GRAND TETON NATURAL HISTORY ASSOCIATION

The Grand Teton Natural History Association assists the National Park Service in the development of a broad public understanding of the geology, plant and animal life, history, and related subjects pertaining to Grand Teton National Park. It aids in the development of museums and wayside exhibits, offers for sale publications on natural and human history, and cooperates with the Government in the interest of Grand Teton National Park.

Mail orders: For a publication list, write the Grand Teton Natural History Association, Moose, Wyoming 83012.

Creative Director: Century III Advertising. Inc.

Designer: Les Hays Studios, Inc.

Color Separations—Assembly—Plates: Orent Graphic Arts, Inc.

Type: Bodoni and Gothic

Printer: Omaha Printing Co.

Printing: Offset Lithography.

Six Colors on Covers

Two Colors on Body

121

GEOLOGIC MAP OF GRAND TETON NATIONAL PARK High-resolution Map

EXPLANATION

CENOZOIC

QUATERNARY

Sand, gravel, and talus

Includes glacial outwash and materials deposited by present streams

Landslide deposits

Moraine deposits of Pinedale glaciers

Moraine deposits of Bull Lake and older glaciers

TERTIARY

Volcanic rocks

Lava flows and volcanic ash

Conglomerate, sandstone, shale, claystone, marl, and pumice

Deposited on land or in shallow lakes

MESOZOIC

Conglomerate, sandstone, shale, and coal

Deposited on land

Shale, sandstone, and limestone

Mostly deposited in shallow seas

PALEOZOIC

Limestone, shale, and sandstone

Deposited in shallow seas

PRECAMBRIAN

Diabase dikes

Granite, gneiss, and schist

Fault

Dashed where approximately located; dotted where concealed beneath unfaulted younger deposits. U is on the side that moved up; D, on the side that moved down

Geologic contact

View southwest from Lake Solitude toward the Grand Teton (right), Mt. Owen, and Mt. Teewinot. Wyoming Travel Commission photo by J. R. Simon.

Grand Teton, Mt. Owen, and Mt. Teewinot from Jenny Lake Flat. National Park Service photo by W. E. Dilley.