Part 14

O obsidian 101 oreodonts 97 outwash 31 outwash plain 31 outwash terraces 34

P pegmatite 56 period 46 Pinedale Glaciation 109

Q quartzite 63

R reverse fault 39 rhyolite 100 rock glaciers 26

S schist 51 sedimentary rocks 45 series 47 serpentine 55 “soapstone” 55 Sundance Sea 79 systems 46

T talus 24 Targhee uplift 83 Teewinot Lake 92 terminal moraine 30 Tetons 8 Teton fault 37 thrust fault 39 timberline 15 titanothere 97 treeline 15 Triceratops 85 trilobites 70 tuff 92

W welded tuff 101

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

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

Transcriber’s Notes

—Retained publication information from the printed edition: this eBook is public-domain in the country of publication.

—Corrected a few palpable typos.

—Re-arranged text in captions closer to the corresponding image.

—Expanded ambiguous references to illustrations, e.g. “Figure D” to “Figure 16D”

—Added one section heading, “The First Big Lake” to match the table of contents.

—Included a transcription of the text within some images, with estimated scale readings from charts.

—In the text versions only, text in italics is delimited by underscores.