International U.S. DEPARTMENT OF THE INTERIOR OPEN FILE REPORT Lithosphere U.S. GEOLOGICAL SURVEY OFR 01-461 Program Text accompanies map Map of Quaternary Faults and Folds of A project of International Lithosphere Program Task Group II-2, Major Active Faults of the World

Data compiled by Michael N. Machette, Kenneth L. Pierce and James P. McCalpin Digital representation by Richard L. Dart Project coordination by Michael N. Machette (Co-chairman, ILP Task Group II-2) 104°00' 111°00' 105°00' 110°00' 106°00' 109°00' 108°00' 107°00' 2001 642a

642b Broadus MAP EXPLANATION

111°00' 110°50' 110°40' 110°30' 110°20' 110°10' 110°00' TIME OF MOST RECENT SURFACE RUPTURE STRUCTURE TYPE AND RELATED FEATURES 45°00' 45°00' Historic (1959, Hegben earthquake) Synclinal fold Holocene (<10,000 years) or Normal fault 642b 746a post last glaciation (<15,000 years; 15 ka) Fault section marker

Red Lodge Yellowtail Late Quaternary (<130,000; post penultimate glaciation) Fault group boundary Reservoir Late and middle Quaternary (<750,000 years; 750 ka) DETAILED STUDY SITES 746b 747 731-2 747 750 Quaternary, undifferentiated (<1,600,000 years; <1.6 Ma) Trench site 45°00' Cooke City + Class B, suspect (shown in black on inset map) 768c-1 Other site 45°00' MONTANA + + + + + 746a + + + + + + 747 Area of no Quaternary faults or area unmapped CULTURAL AND GEOGRAPHIC FEATURES Yellowstone + + + 747 748 National Park boundary National Park ° ° SLIP RATE 44 50' + + + + + + 44 50' Primary highway 658 750 655b 657a 747 Bighorn Lake 1.0-5.0 mm/year 656-1 Primary or secondary road 747(<750ka) Cowley 656-2 748 0.2-1.0 mm/year 660 656 746b Permanent river or stream 747 747 655b Hebgen 657a-1 747 <0.2 mm/year Lake 749b SHERIDAN 659 657c Lovell 746b 750 Intermittent river or stream 657b 750 657c 749a 659 752 752 763 749a Sheridan 657b TRACE Permanent lake 747 747 Powell 659 763 749b 655c 758 Belle Fourche Mostly continuous at map scale Intermittent or dry lake (playa) B

i West r g 763 e Ho 758 iv Mostly discontinuous at map scale Yellowstone 750 R e r 747 747 n n BIG HORN o h R 643d s Inferred or concealed 754 i 758 o v CROOK 750 h e 750 S r Story 763 755 PARK + 753 44°40' + + ++ + Spearfish+ + 44°40' + 754 754 + 758 + + Cody + + 763 + + + + + + + 758 750 DATA ON QUATERNARY FAULTS AND FOLDS IN WYOMING 757a ellowstone 759 Y Lake Graybull Yellowstone Buffalo Bill 763 619 Reservoir Abbreviations: ka, thousands of years ago; Ma, millions of years ago. Reported length is straight line, from end to end. Class B structures 751 Deadwood 757b National Park are shown on map, and mentioned in text. Fault no. 745 not used on map or in database. 763 Keyhole 754 758 762 760 Reservoir Number Name of structure Primary Most Slip rate Length Azimuth Fault Dip Shoshone Basin Lake Buffalo CAMPBELL 1° x 2° recent (mm/yr) (km) (average) type direction 766 761 Gillette sheet event 757c 754 763 767a 657 Red Canyon fault ------35.3 N63°W ------763 750 657b Richards Creek section Driggs <15 ka <0.2 5.2 N76°W Normal S 619 764 755 657c Maple Creek Section Driggs <750 ka <0.2 4.0 N73°W Normal S 765 753 767b 724 Faults south of Blacktail Butte Driggs <130 ka <0.2 1.5 N9°W Normal W, E 766 767c 44°30' + + + + + + 44°30' 725 Secondary faults in Jackson Hole Driggs <130 ka <0.2 33.1 N5°W Normal W, E 764 764 ??

TA Valley (Class B) 761 754 759 °

Ashton 764 726 Grand Valley fault ------135.5 N22 W ------757a O ° 726b Grand Valley section Driggs <1.6 Ma <0.2 30.9 N29°W Normal SW 764 Some sense of + Yellowstone 44 00' ° 768a 764 JOHNSON + 726c Unnamed section near Prater Mountain Driggs <130 ka <0.2 17.2 N7°W Normal W

44 00' + movement indicators + K Lake + + 726d Star Valley section Preston <15 ka 0.2-1.0 51.5 N8°W Normal W 768b-1 not shown for clarity + + + + 759 + + + + + 727 Unnamed piedmont fault Preston <130 ka <0.2 1.6 N9°W Normal W, E 764 Worland WESTON 728 Greys River fault Preston <15 ka 0.2-1.0 49.4 N3°W Normal W 768b Jackson 751 Lake 729 Rock Creek fault Ogden <15 ka 0.2-1.0 40.5 N5°E Normal W TETON 763 Newcastle 757b 730 Bear River fault zone Ogden <15 ka 1.0-5.0 33.2 N11°W Normal W, E 768c-1 WASHAKIE 751 731 Absaroka fault Ogden <15 ka 0.2-1.0 3.7 N18°E Normal W 768c Shoshone 764 25 760 732 Hogsback fault ------52.4 N7°E ------769 Lake 725 770 732a Northern section Ogden <750 ka 0.2-1.0 22.4 N17°E Normal W 762 732b Southern section Ogden <750 ka 0.2-1.0 38.3 N4°E Normal W 768e

Grand Teton 44°20' + + + + DA UTH + + 44°20' ° Driggs 725 733 Sublette Flat fault Preston <1.6 Ma <0.2 36.0 N10 E Normal W 757c ° 768c National Park HOT SPRINGS Lewis 767a 734 Eastern Bear Valley fault (Class B) Ogden <1.6 Ma <0.2 47.2 N2 E Normal W 761 735 Western Bear Valley faults Ogden <1.6 Ma <0.2 12.4 N21°E Normal E 768d-2 Lake 766 768f 768d 736 Elk Mountain fault Ogden <1.6 Ma <0.2 7.8 N20°E Normal W 724 SO ° 768d-1 737 North Bridger Creek fault Ogden <1.6 Ma <0.2 4.2 N17 E Normal W Thermopolis Heart 738 Spring Creek fault Ogden <1.6 Ma <0.2 2.3 N25°E Normal W 768d 756 764 Lake ° 771a 763 739 The Pinnacle fault Ogden <1.6 Ma <0.2 2.3 N25 W Normal W + 740 Ryckman Creek fault Ogden <1.6 Ma <0.2 5.3 N9°W Normal W 771b 725 + +771c B + 741 Whitney Canyon fault Ogden <15 ka <0.2 5.5 N18°W Normal W, E Dubois i 756 + + g + + + + H + + 742 Almy fault zone Ogden <1.6 Ma <0.2 10.7 N3°E Normal E Swan Map area shown in + o + + r

Jackson n ° 726a 772 767a 743 Duncomb Hollow fault Ogden <1.6 Ma <0.2 2.4 N44 W Normal E Valley detail on inset map R 761 i °

v 744 Faults on north flank of Phil Pico Mountain Rock Springs <130 ka <0.2 4.4 N83 E Normal N e

r 766 773 746 East Gallatin-Reese Creek fault system ------39.6 N2°W ------726b 772 746a Reese Creek section Ashton <1.6 Ma <0.2 13.5 N5°E Normal E 774 44°10' + + 765 + + + 767b + 44°10' FREMONT 746b East Gallatin section Ashton <750 ka <0.2 26.9 N13°W Normal E Boysen 747 Post-Lava Creek faults in NW Ashton <750 ka <0.2 49.2 N23°W Normal E, W Reservoir 764 765 764 767c Palisades Yellowstone National Park Reservoir ? ? 748 Unnamed faults near Opal Creek Ashton <15 ka <0.2 2.5 N53°W Normal NE 761 749 Mirror Plateau faults ------23.5 N39°W ------726b 764 Bull 749a Younger section Ashton <15 ka 0.2-1.0 18.4 N36°W Normal NE, SW Lake 749b Older section Ashton <750 ka <0.2 23.1 N43°W Normal NE, SW Ocean 764 Lake Arminto 750 Unnamed faults in the Burnt-Raven Ashton <750 ka <0.2 44.8 N13°W Normal E to NE, Creek area W to SW 726c WESTON 751 Shoshone Lake faults Ashton <750 ka <0.2 6.0 N15°W Normal G 43°00' 752 Wolf Lake fault and nearby faults Ashton <15 ka <0.2 6.0 N33°W Normal NE Win N 764 + W d Y O M I 768a R ° 43°00' iv + 753 Mallard Lake resurgent dome Ashton <750 ka <0.2 11.0 N43 W Normal NE, SW + er + 728 + + + + faults (Class B) 727 726d + + + Riverton + + + + CONVERSE 44°00' + + 764 + + + + 44°00' 754 Elephant Back fault zone Ashton <130 ka <0.2 28.1 N47°E Normal NW, SE 755 Lake Hotel faults (graben) Ashton <15 ka <0.2 2.0 N2°W Normal E,W Fremont NATRONA 764 ° Lake 768b-1 756 East Gros Ventre fault (Class B) Driggs <15 ka <0.2 19.5 N47 E Normal SE, E 757 Eagle Bay fault ------30.9 N3°E ------728-1 ° Glenrock Jackson 764 757a Northern section Ashton <15 ka <0.2 12.6 N5 E Normal E 757b Middle section Ashton <15 ka 0.2-1.0 5.9 N3°E Normal E 25 Lake IDAHO ° SUBLETTE Lander Casper 768b 757c Southern section Ashton <750 ka <0.2 13.8 0 Normal E Lusk 758 Sour Creek Dome faults (Class B) Ashton <750 ka <0.2 14.9 N31°W Normal All 726d-1 Douglas ° Afton 759 Faults near Clear Creek (Class B) Ashton <15 ka <0.2 8.5 N12 E Normal W 760 Faults of Brimstone Basin area Ashton <15 ka <0.2 7.8 N17°W Normal E, W 761 Upper Yellowstone Valley faults Ashton <15 ka <0.2 24.9 N9°W Normal E, W 777a 768c-1 762 Faults near Trishman and Douglas Knobs Ashton <130 ka <0.2 4.3 N29°W Normal NE, SW 777a-1 768c 763 Faults along the Lava Creek caldera Ashton <750 ka <0.2 64.6 N49°W Normal all 775 728 764 margin (Class B) 726d 43°50' + + + + + + 43°50' 764 Faults in boundary region of Yellowstone Ashton <1.6 Ma <0.2 50.8 N8°W Normal E, W Alcova + Georgetown + 769 and National Parks + + Reservoir + + 765 Snake River caldera faults Ashton <750 ka <0.2 13.5 N4°E Normal E + + + + + + 725 ° + + Jefferson City + 770 766 East faults Ashton <15 ka 1.0-5.0 21.4 N3 W Normal E Grand Teton 767 Buffalo Fork fault ------30.0 N1°E ------778 2364a National Park 767a Northern section Ashton <750 ka <0.2 24.9 N5°E Normal E 779a Pathfinder 767b Middle section Ashton <15 ka <0.2 3.2 N22°W Normal E 779b 778 Reservoir 768e 767c Southern section (Class B) Ashton <1.6 Ma <0.2 2.2 N9°W Normal E Montpelier 779b-1 768 Teton fault ------58.6 N19°E ------776 768c ° 779c 725 768a Steamboat Mountain section Driggs <15 ka <0.2 4.6 N22 E Normal E 2364b 779d 768b Northern section Driggs <15 ka 0.2-1.0 12.2 N18°E Normal E 779d-1 Guernsey 768c Middle section Driggs <15 ka 1.0-5.0 21.3 N6°E Sinistral E 776 Greyrocks 768d Southern section Driggs <15 ka 0.2-1.0 17.8 N28°E Normal E 734 733 Reservoir GOSHEN 768e Avalanche Canyon section Driggs <15 ka <0.2 7.7 N21°E Normal E 779e 43°40' + + 768d + + + + 43°40' PLATTE768d-2 768f Granite Canyon section Driggs <15 ka <0.2 6.0 N30°E Normal E 729 LINCOLN 769 Togwotee Lodge faults Driggs <15 ka <0.2 4.1 N13°W Normal E 770 Baldy Mountain fault Driggs <15 ka <0.2 1.8 N4°W Normal E 780 Fontenelle Seminoe 768d-1 Torr ington 771 Phillips Valley faults ------8.0 N44°E ------734 Reservoir Wheatland ° 2364c Reservoir 768f 724 + 42 00' 771a Northern section Driggs <130 ka <0.2 4.4 N61°E Normal SE 42°00' Bear + + + 771b Middle (Ski Lake) section Driggs <15 ka <0.2 1.1 N24°E Normal E Lake 735 + + + + ° + + + + + + + Mitchell 771c Southern (Glory Slide) section (Class B) Driggs <130 ka <0.2 2.8 N16 E Normal E (?) 772 Hoback fault (Class B) Driggs <130 ka <0.2 18.2 N40°W Normal SW 768d 756 ALBANY 773 Stagner Creek fault Thermopolis <15 ka <0.2 27.0 N77°W Normal S ° 2531 735 729-1 Scottsbluff 774 Cedar Ridge fault Arminto <750 ka <0.2 1.2 N74 E Normal N 733 Medicine Bow 775 Leckie fault (Class B) Lander <1.6 Ma <0.2 17.0 N24°W Normal SW 771a 725 ° 2364c Hanna 771b Gering 776 Continental fault (Class B) Lander <1.6 Ma <0.2 58.7 N75 W Normal NE 729 ° 734 SWEETWATER 777 North Granite Mountains fault system ------27.9 N82 E ------Kemmerer 43°30' + 771c + + + 020+ 10+ 30 km 43°30' 777a Western section (Class B) Casper <1.6 Ma <0.2 27.9 N82°E Normal S Rawlins 778 Split Rock Syncline (Class B) Lander <1.6 Ma <0.2 75.2 N82°W Normal N-S (limbs) 736 737 Gree Jackson 779 South Granite Mountains fault system ------132.5 N72°W ------2346 Scale 1:320,000 n Ri 779a Crooks Mountain section (Class B) Casper <1.6 Ma <0.2 33.6 N73°W Normal N 2410 v Transverse Mercator Projection Randolph e 756 ° r 80 ° ° 779b Green Mountains section Casper <15 ka <0.2 24.3 N79 W Normal N 738 (longitude of central meridian 110 30'W; latitude of origin 0 ) 779c Muddy Gap section Casper <1.6 Ma <0.2 21.3 N64°W Normal N CARBON 779d Ferris Mountains section Casper <15 ka <0.2 18.4 N68°W Normal N 43°25' 43°25' 779e Seminoe Mountains section (Class B) Casper <1.6 Ma <0.2 35.0 N68°W Normal N 2346 739 Cooper Lake 111°00' 110°50' 110°40' 110°30' 110°20' 110°10' 110°00' 780 Chicken Springs faults Casper <15 ka <0.2 13.7 N79°W Normal N, S Rock Springs + 2380 Porcupine Mountain faults (Utah and Ogden <130 ka <0.2 34.6 N18°E Normal W,E + + 740 + Green River + + Wyoming) 2365 + + + + 741 + + + + +

741-1 UINTA 80 Saratoga ° ° ° 104° LARAMIE KA 110 108 106

732a S 742 ° 743 Laramie Kimball 45° 45 2365 Lake Hattie Evanston 732b Reservoir 732a Pine Bluffs 80

2380 Flaming Gorge BRA Gillette Reservoir Cheyenne Ashton Cody Sheridan 731-1 730

731-2 732b E 731 730-1 730-2 44° 44°

730-4 730-3 N 730-5 + 41°00' 41°00' 2380 + 732b + + 730 + + + + Driggs Thermopolis Arminto Newcastle 744 + + + + + + + 730 732b-1 732b UTAH ° 43° COLORADO 43

Preston Lander Casper Torrington Steamboat 25 Lake 42° 42° 2389 2391 Kamas 2390 Ogden Rock Springs Rawlins Cheyenne Fort Collins Heber City 41° 41° 104°00' 111°00' Craig 105°00' ° 110 00' 109°00' 108°00' 107°00' 106°00' ° 110° 108° 106° 104 Diagram of topographic map sheets for Wyoming. Yellow-shaded area has no Quaternary faults or area is unmapped. Scale 1:750,000 0 50 100 150 km Lambert Conformal Conic Projection, Clarke 1866 (1st standard parallel 33°N, 2nd standard parallel 45°N; This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey longitude of central meridian 108°W; latitude of origin 0°) editorial standards or with the North American Stratigraphic Code. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. A PDF file for this map is available at http://geology.cr.usgs.gov/greenwood-pubs.html