U.S. DEPARTMENT OF THE INTERIOR Prepared in cooperation with the U.S. GEOLOGICAL SURVEY NATIONAL PARK SERVICE MISCELLANEOUS FIELD STUDIES MAP MF–2411

109 52 30 109 50 00 109 47 30 109 45 00 38 15 00 38 15 00 Po Pc *e CORRELATION OF MAP UNITS Qae Pc Pcu Qed Qs Qr Qae SURFICIAL DEPOSITS *e Pcu Qae *e Qf1/Qr *e Qaf Qs Qfp Qr Qp Qed Qes Qrf Qt1 Qf1 Qf2 Qae Qal Qt2 Holocene QUATERNARY Qfp *h Qt3 Pleistocene Qr Qr Pc *e Qes SEDIMENTARY ROCKS 10 Qae Qed Unconformity *e 50 Qr Po Po Pc PERMIAN Pc Pcu Pc Qr Qs Qed *e Upper Qae Pennsylvanian *e Unconformity *h Qae Pcu PENNSYLVANIAN Qr Qae *h Middle and Upper Qae Pennsylvanian Qf1/Qr *e Qae Pc Qr *e Qes Qae DESCRIPTION OF MAP UNITS Qal Alluvial deposits (Holocene and Pleistocene?)—Gray, light-red, and Qae 45 *h [Units shown with slashes indicate thin deposits of the first unit over the second and sometimes light-brown clay, silt, sand, and interbedded lenses of pebble-size third unit. Not all composite units are shown. Some unit exposures on the plotted map are too gravel; partly consolidated. Unit intertongues with or is *h small to distinguish the color for unit identification. These units are labeled where possible, Qae Qr Qae and unlabled units are attributed in the database] overlapped by intermediate (Qt2) or old alluvial terrace (Qt3) Qed deposits. Common in low-gradient valleys in The Grabens area *e *h Qes SURFICIAL DEPOSITS and within narrow tributary drainages of Salt Creek and other Qed/Qae Surficial deposits are differentiated from one another chiefly on the basis of unnamed canyon drainages. Deposit is commonly subject to Pc Qes/Qae Qr difference in morphologic character and physiographic position illustrated on aerial arroyo erosion as much as 10 ft in depth in narrow tributary Qed photographs and field observations. Older alluvial and aeolian deposits generally canyons caused by headward erosion from larger mainstream exhibit extensive erosion, whereas younger deposits are actively accumulating drainages such as Salt Creek. Unit is subject to sheet-wash Qs *e material or are lightly eroded as observed on 1995 color aerial photographs. Salt is a flooding and ponding of silt and mud due to either thickness of Qae Qed Qae Qae common constituent in all alluvial deposits and, to a lesser degree, in aeolian vegetation cover or fresh sand accumulations that allow temporary Qae Qae deposits ponding of a few months to a few years. Support moderate to Qed/Qae thick growth of sagebrush, grass, cactus, and tall shrubs. Qes/Qae Qae Qaf Artificial fill and quarries (Holocene)—Alluvium and (or) bedrock Qae material removed from barrow-pits and trenches to build stock Thickness, 10 to 40 ft or more Qae Pc tanks, drainage diversion dams, roads, and other construction Qt2 Intermediate alluvial terrace deposits (Holocene and Qed Pc projects other than modern highways. No distinction on map Pleistocene?)—Gray, light-red, and brown clay, silt, and fine- to Pc Qed/Qae Pc Qr Qae between cut or fill excavations. Areas generally disturbed by coarse-grained sand similar to young (Qt1) deposits; partly Qae Qes consolidated. Deposits form terraces generally 8 to 12 ft above Qes Qr *h construction projects or quarrying Pcu local streambeds and often inset against old alluvial terrace (Qt3) Qes/Qae Qs Stream-channel alluvium (Holocene)—Interlensing silt, sand, gravel, Qes deposits, but equivalent to tributary alluvium (Qal) in upper valley Qae Qae Qes and pebbles; unconsolidated and poorly sorted. Locally overlaps Qr Qf1/Qr *e Pc or erodes into young and intermediate alluvial terrace deposits reaches of Salt Creek. Gradational and arbitrary contact between Qes Qr Qes Qes (Qt1, Qt2) and floodplain (Qfp) deposits. Generally inset against alluvial (Qal) deposits where tributary drainages intersect Salt Qae young, intermediate, and old alluvial terrace (Qt1, Qt2, and Qt3) Creek. Support moderate growth of cottonwood trees, rabbit Qs Qes Qal Qes brush, and sagebrush. Thickness, 8 to 14 ft *h Qes Qed/Qae deposits. Gradational contact with floodplain (Qfp) deposits. Stream channels subject to intermittent high-energy flows and Qt3 Old alluvial terrace deposits (Pleistocene)—Gray and light-brown Po Qt1 flash floods producing sediment accumulation on floodplains or clay, silt, and sand similar to young (Qt1) and intermediate (Qt2) Qes Qed Qed lateral erosion into young, intermediate, and old terrace deposits. alluvial terrace deposits. Locally, include lenses of small pebble Qed Qrf Qes Little or no vegetation growing in stream channels except for local gravel and conglomerate composed of white and red, rounded 38 12 30 Qed Qt2 Qae 38 12 30 Qed tamarisk, willow, juniper, or oak trees due to close proximity to sandstone, blue-gray rounded limestone, and subrounded red chert Qed Qed bedrock where ground water is shallow. Thickness, 3 to 6 ft in coarse-grained gravel matrix. Unit grades or intertongues into Qt2 Qes Qf1 local tributary alluvium (Qal) or alluvium and sand-sheet (Qae) Qae Qed Qfp Floodplain deposits (Holocene)—Light-gray or tan silt, fine- to Pc Qt1 Qes Qae deposits along lower reaches of Salt Creek. Form terraces about Qed/Qf1/Qt1 coarse-grained sand, and interbedded pebble gravel lenses; Qt1 unconsolidated. Gravel locally contains red, subrounded to 15 to 24 feet above stream (Qs) deposits. Scattered and isolated *h Qrf Qrf Qed/Qf1/Qt1 Qed Qed/Qes/Qae Qes subangular chert fragments and gray-blue, rounded limestone old terrace deposits in upper reaches of Salt Creek and in cutoff Qae *e Qf1 meander loops often covered by sand dune (Qed) deposits. Qrf pebbles 0.25 to 0.75 in. in diameter. Seasonal floods may produce Qrf Qrf fresh deposits that generally accumulate on the inside bends (point Support thick to moderate growths of sagebrush, rabbit brush, Pc Qae Qes Pc *e Pc cactus, and minor grasses; cactus is most common along Salt *h bars) of drainages and locally erode into or overlie young alluvial Qae Creek. Commonly interbedded with or overlapped by ponded *h terrace (Qt1) deposits. Subject to stream-channel erosion or Qt1 Qt1 Qs Qes/Qae (Qp), alluvium (Qal), and alluvium and sand-sheet (Qae) deposits Qs Qes Qed overbank flooding. Gradational and arbitrary contacts between Qrf Qed/Qae along lower reaches of Salt Creek. Thickness, 14 to 25 ft Qrf stream-channel (Qs) and floodplain (Qfp) deposits both laterally Qr Qrf *e Qed/Qae and vertically. Support thick growths of tamarisk trees and other *h Qae Qae Qed/Qes/Qae SEDIMENTARY ROCKS Qt1 water-dependent plants where stream bedrock is very shallow, *e Pc Qae Po Organ Rock Member of the Cutler Formation (Permian)—Dark- Qrf Qae usually less than 10 ft in depth. Dense growths of tamarisk often Pc Qs Qae red, fine- to coarse-grained, thin-bedded, slope-forming, arkosic Qrf Qae Qae help to trap and accumulate sediment to form floodplain deposits. sandstone and siltstone. Includes dark-red conglomeratic Qed Deposits are generally 3 to 6 ft above stream-channel deposits and Qae Qae sandstone lenses that form ledges in upper part. Gradational Qae *h Pc Qt3 often grade laterally into stream-channel (Qs) deposits where Qae Pc southwest facies change from coarse-grained, ledge- and slope- *e Qs Pc Qae Pc stream is not eroding. Thickness, 3 to 10 ft Qal Qes Qfp Qes forming arkosic sequence to alternating fine-grained, slope- Qae Qr terrace deposits (Holocene)—Gray and brown clay, Qed/Qae forming sandstone, siltstone, and mudstone sequence. Unit Qt2 silt, and sand; unconsolidated. Form terrace deposits along banks Qal Qae Qes intertongues with underlying forming a of the Colorado River consisting of thin-bedded to laminated beds Qae Qal gradational and arbitrary vertical and lateral contact with Qes *e Qes/Qt1 Qt3 of silt and fine-grained sand and interbedded coarse-grained lenses underlying Cedar Mesa Sandstone marked by a color contrast Qs Qal Qt3 Qae Qae Qrf Qae Qs Qes of small pebble gravel. Include interbedded thin beds of gray and from dark red Organ Rock Member of the Cutler Formation to *e red mud and clay. Support heavy vegetation cover of tamarisk Pc Qed/Qae white Cedar Mesa Sandstone in southern part of map area, and trees and sagebrush. Thickness, 15 to 40 ft dark red Organ Rock Member over light red Cedar Mesa

Qae *e Qes

0 1 Qes Qes Qrf Qal Qt2 Qp Ponded deposits (Holocene)—Light-gray to white clay, silt, and fine- Sandstone in northeast part of map area. Contact with overlying Qed/Qae/Qf1 Qs gained sand. Locally include angular red chert fragments and Qed/Qf1 Pc Qal Qt3 Triassic Moenkopi Formation is unconformable just east of the Qae small, gray-blue, rounded limestone pebbles. Sediments Qf1 Qes Qrf Qfp map area, but not present within the map area due to modern Qae accumulate in temporary ponded areas on intermediate and old Qt1 Qae Qae erosion. Thickest incomplete section, about 60 ft thick, caps the Qed Qp/Qt3 alluvial terrace (Qt2 and Qt3) deposits along Salt Creek due to Qp/Qal top of highest unnamed ridge in northeast quarter of map area and Qal Qae Qt2 Qp/Qae Qal temporary natural sand dune accumulations or flood overbank forms red caprock, less than 30 ft thick, on small, unnamed mesas Qs Qae Qae Qes Qal sand levee deposits that prevent sediments from reaching Salt Qrf Qp/Qal Qt1 Qae Qt3 in south part of map area Qs Qae Qed Qed Creek for an extended, unknown amount of time. Some deposit Qal Qt1 Pc Qt2 Pcu Cutler Formation and Cedar Mesa Sandstone, undifferentiated Qae Qes Qes/Qae areas have been breached by low-gradient outflow drainage due to Pc *e Qt2 Qs (Permian)—Light-red, fine- to coarse-grained, well-sorted, cliff- 30 gradual headward erosion from Salt Creek. Include ponded Qt2 forming sandstone and interbedded dark-red, coarse-grained, Qes Qes Qfp deposits in Chesler Park and other areas where widespread sand Pc Qal slope-forming gravel, sandstone, and mudstone beds. Includes Qt1 Qes Qt3 Qt1 sheet and dunes accumulate and form temporary internal ponded Qed/Qt1 Pc Pc Qs minor beds of white, fine- to coarse-grained sandstone and blue- Qes Qae areas that eventually become subject to erosion. In The Grabens Pc Qae Qes/Qal gray, thin-bedded, fossiliferous limestone. Dashed line on map Qt1 area, ponded deposits either have no external drainage or 80 Qp/Qt3 Qal Qae/Qt1 represents the median of a two-mile-wide transition zone, which is Qal accumulate in lowland areas where drainage is blocked by young a regional general facies change from numerous light-red and Qf1/Qal Qes Qae Pc *e Qal faulting. Desiccation cracks often form on dry, hardpan surface Qae Qae dark-red fluvial arkosic sandstone and siltstone sediments of the

that restricts plant growth. Thickness, 1 to 6 ft Cutler Formation that intertongue with or grade southwestward

5 3 Qae Qae Qed Qes/Qp/Qae *e Qed Sand dune deposits (Holocene)—Light-red to white silt and fine- to into white and light-red, fine-grained, well-sorted, highly Qt1 Pc Pc Qes/Qt3 Qp/Qal Qes coarse-grained aeolian sand. Form climbing dunes that ramp crossbedded marine sandstone beds of the Cedar Mesa Sandstone Pc Pc Pc Qaf Qt3 Qp/Qt3/Qal upward toward steep or cliff topography and falling dunes on (Huntoon and others, 1982; Baars, 1962, 2000). Light-red Qrf 40 Qes/Qt3 steep, downslope topography. A few minor barchan dunes present, sandstone beds of the Cedar Mesa Sandstone thin and pinch out *e Qes/Qal Qes Pc no parabolic dunes observed. Arbitrary and gradational contact into the Cutler Formation within a few miles northeast of the map Pc Qt3 *e Qes Qal Qae Qes Qed between sand-sheet (Qes) and alluvium and sand-sheet (Qae) 38 10 00 Qae Qs 38 10 00 area. Unit forms a series of alternating sandstone cliffs and Qae/Qal Pc Qal Qed/Qes deposits based on topography, aerial photography, or relative siltstone slopes. Thickness, 800 ft Qes Qes thickness of sand. Dune surfaces are commonly active in large 15 Qal Qes Qal Pc Cedar Mesa Sandstone (Permian)—Light-red to white, slope- and Qt1 Qal open valley areas that support sparse growths of grass or small cliff-forming, medium- to thick-bedded sandstone and siltstone *e Qt1 Qed/Qes/Qae Qal Qae Qes/Qae Qed shrubs. Unit is highly stabilized by grassy vegetation or by crypto- interbedded with dark-red, coarse-grained, arkosic gravel, Pc organic growths in small, nearly enclosed basins or in some Qae Qes sandstone, siltstone, and mudstone. Includes thin-bedded, blue- 280 reaches of local canyon drainage areas. Thickness, 12 to 30 ft *e Qae Qes Qes/Qal Qp/Qae gray limestone beds as channel lenses interbedded within dark-red Sand-sheet deposits (Holocene)—Light-red to white silt and fine- to Qt2 Qes Qae Qes siltstone and arkosic gravel in lower slope. High-angle, *e Qae coarse-grained aeolian sand on flat-topped ridges and mesas Qaf crossbedded sandstone sets accumulated at or near a fluctuating 40 Qae/Qal Pc Qs Qes Qfp derived from the Cedar Mesa Sandstone (Pc). Deposit also shoreline environment as aeolian coastal dune deposits, and Qed Qt1 Qp/Qal Qed/Qae accumulates downwind of local surficial (Qs, Qt1, Qt2, Qt3, Qae, interbedded with low-angle, crossbedded sandstone sets 280 Qae/Qal Qal, and Qed) deposits. Unit forms widespread sand ramps on containing rare crinoid ossicles representing near-shore shallow 40 Qae Qes Qs Qes southwest-sloping topography. Deposit often leads to sand dune Qae Qae/Qt1 coastal deposits. Lower slope unit is red, thin-bedded siltstone, Qal Qes/Qae (Qed) accumulations that pile up against steep bedrock sandstone, and interbedded blue-gray, thin-bedded limestone and Qes topography, which also slows the wind to allow sand sheet or dune Qed Qt1 Qes/Qae Qae Qt3 calcareous sandstone. Contact with underlying Elephant Canyon 35 Qal Qt1 accumulation on steep down-slope topography that acts as sand Qes Qae Pc Qt1 Formation (*e) is gradational and arbitrary, both laterally and Qrf *e Qt2 Qae Qes/Qae Qed trap areas. Dunes are often stabilized by grassy and small shrub vertically, and placed at the highest continuous cliff-forming Qes Qaf Qes Qal Qt2 vegetation during wet year conditions. Arbitrary and gradational Qt1 Qfp limestone bed of the Elephant Canyon Formation. Thickness, as Qes Qed Qes Qs Qt1 Qae lateral and vertical contact between sand-sheet (Qes) and sand much as 1,500 ft Qaf Qfp Qaf Qt2 dune ( ) deposits based on morphologic interpretation of aerial Qal Qs *e Qes Qed *e Elephant Canyon Formation (Upper Pennsylvanian)—Blue-gray, Qal Qs Qed/Qae Qt2 Qal Qae Pc Qt1 photos. Only most extensive mappable deposits are shown. thin- to medium-bedded, cliff- and slope-forming fossiliferous Pc Qaf Qal Qes Qt3 Qs Support moderate growths of grass and blackbrush. Thickness, 0.5 limestone, calcareous sandstone, and interbedded red and gray-red Qae Qes Qal Qt1 30 to 3 ft, but as much as 9 to 12 ft in large valleys and enclosed basin calcareous siltstone and mudstone. Unit generally forms a series Qes Qed/Qt2 Qal areas of limestone cliffs and sandstone and siltstone slopes. Limestone Qae *e Qae Qrf Rock fall debris (Holocene)—Sand, small and very large broken Qt2 Qal beds thicken and thin locally and pinch out laterally. Originally Qae *e Qt1 Qt1 boulders that form talus debris slopes in steep-walled canyons and indicated as Lower Permian (Wolfcampian) age (Baars, 1962), but Qed Qed Qp/Qae 50 as local rock falls in The Grabens area. Includes individual large, more recently established as latest Pennsylvanian (Virgillian) age Qae Qae Qt1 Qed car- and house-size boulders in The Grabens area. Thickness, 1 to based on re-examination of fusulinids (Baars, 2000). Unit grades 85 Qt1 Qes Qed Pc Qaf Qs 160 Qed Qes Qes Qal 25 ft southward into red beds of the Halgaito Formation just south of Qal *e Qal Qt3 Qt1 Young alluvial terrace deposits (Holocene)—Gray to light-reddish- the map area, and northeast into the arkosic rocks of the Cutler 130 Qf1 Qed/Qae Qt1 Qed 110 Qt1 Qs Qfp Qes Qfp brown clay, silt, and fine- to coarse-grained sand; unconsolidated. Formation just north of the map area. Unconformable contact Qp/Qf1/Qf2 Qes Qes Qae Include interbedded lenses of gravel composed of red, subangular with underlying Honaker Trail Formation (*h) marked by slight Pc Qt1 Qt2 chert fragments; small, gray-blue, subrounded limestone pebbles; angular discordance difficult to see near confluence of Green and Qae Pc and red or white, well-rounded sandstone pebbles. Deposits inset Qae Qae Colorado Rivers just west of the map area (Baars, 2000). Map Qed Qfp against intermediate (Qt2) and old (Qt3) alluvial terrace deposits. contact placed at top of most prominent and continuous limestone Pc Qt3 Unit subject to flash flooding and local stream erosion. Heavily bed of the Honaker Trail Formation that forms a sequence of Qf2 Qae Qs Qal Qal Qes Qae Qt1 vegetated by sagebrush; include cottonwood and willow trees. limestone cliffs down to the Colorado River. Variable thickness *e Qal Qp/Qal 120 Qt1 Qed/Qt3 Qed/Qae Qed Qal Form terraces 4 to 8 ft above stream-channel alluvium (Qs) due to arbitrary boundaries, 320 to 380 ft Qae Qae Qes/Qt3 Pc deposits. Thickness, 4 to 10 ft or more *h Honaker Trail Formation (Middle and Upper Qrf Qes Qed Qes Qf1 Young alluvial fan deposits (Holocene)—Light-red to brown silt, fine- Pennsylvanian)—Blue-gray, thick-bedded, cliff-forming 240 Qed Qal 90 Qes Qae/Qt3 to coarse-grained interbedded sand and gravel; unconsolidated. limestone, thin-bedded calcareous sandstone, and interbedded, Qf1/Qf2 Qae Qae Qs Qae Qal Red and white chert fragments and small red and white sandstone slope-forming thin-bedded siltstone. Contains numerous fossil Qal Qae Pc Qal Qt1 pebble clasts common and locally derived from nearby bedrock brachiopods, crinoids, bryozoa, corals, pelecypods, gastropods, Qp/Qf1 Qes Qt2 outcrops. In The Grabens area, commonly overlapped by or and fusulinids that date the formation as Middle Pennsylvanian Qrf Qes intertongue with alluvial (Qal) and ponded (Qp) deposits. Subject (middle Desmoinesian) to upper Pennsylvanian (upper Qed/Qae/Qal Qae Qt2 Qs Qes Qt1 Qfp to extensive sheet-wash erosion or sediment accumulation. Missourian) in age (Baars, 2000). Forms sequence of cyclic Qae Qt3 Pc Qal Qes Qes Support moderate growth of grass, tall sagebrush, and various alternating limestone, sandstone, and siltstone beds that comprise Qes Qal small shrub vegetation. Thickness, 5 to 20 ft the bulk of the canyon walls of along the Colorado River. Forms Qed Pc Qed/Qae/Qal Qes Qed/Qal Qf2 Young intermediate alluvial fan deposits (Holocene)—Light-red to disconformable contact with underlying evaporites of the Paradox 5 38 07 30 Qes 38 07 30 brown clay, silt, and fine- to coarse-grained sand; unconsolidated. Formation in subsurface of the map area. Incomplete section; 600 Qae Qt2 Qal Qal Qed/Qal Qt3 Only in The Grabens area. Similar to young alluvial fan (Qf1) to 800 ft exposed in map area Qfp 15 Qal deposits, but subject to sheet wash and arroyo erosion at upper part Qrf Qed Qal 5 Qes Qae Qal of fan. Generally 2 to 4 ft higher than young alluvial fan (Qf1) Contact–Contacts between bedrock units are plotted at the 1:4,000 15 deposits except at distal ends where commonly overlapped by scale on aerial photos and may not match the 1:24,000-scale 45 Pc Qal 40 Qed/Qae Qs Qes Pc Qal Qt2 young alluvial fan (Qf1), ponded (Qp), and alluvial (Qal) deposits. contours Qt1 Qae Qt2 Thickness, 10 to 55 ft Fault–Dotted where concealed; bar and ball on downthrown side. 15 Qed Qal Qs 5 85 Qae Qt1 Qae Alluvium and sand sheet deposits (Holocene and Number is estimated fault separation in feet Qes Qes Qt3 85 Pleistocene?)—Gray, light-red, and brown clay, silt, and fine- to Facies change–Line representing median of two-mile-wide Qed Qal coarse-grained sand interbedded with lenses of coarse-grained Qt2 Qae regional facies change between Cutler Formation on northeast Qt1 Qt1 Qt2 gravel composed of red angular chert fragments and red Qae Qae and Cedar Mesa Sandstone on southwest Qae Qal Qfp subrounded sandstone pebbles. Include sediment accumulated by Qal Qs Qed Qs Qal Qed/Qt3 15 Qae combinations of alluvial or aeolian processes that result in an Sinkhole–Enclosed drainage depressions, crack, or cave Qt1 Qs interbedded mix of aeolian and alluvial deposits. Deposits subject Qed Qed Qt1 Qs Qt3 to sheet-wash erosion and deposition in wet conditions and wind- REFERENCES CITED Qes blown sand deposition in dry conditions. Commonly occupy Baars, D.L., 1962, Permian system of the : American Qae Qt2 Qrf broad lowland tributary valleys and canyons of Salt Creek and Association of Petroleum Geologist Bulletin, v. 46, p. 149-218. Qfp Qal/Qt1 Qs Qed valleys in The Grabens area. Include small isolated deposits where _____ 2000, Geology of Canyonlands National Park, , in Qes Qed/Qt1 Qal Pc Qal Qs water and wind transported materials have accumulated in local Sprinkel, D.A., Chidsey, T.C., Jr., and Anderson, P.B., eds., Qae Qal Qt2 Qae Qt2 shallow canyon drainages or in large joint depressions in higher Geology of Utah’s parks and monuments: Utah Geological Qt3 Qed Qfp slick rock areas. Often overlapped by sand sheet (Qes) or sand Association Publication 28, p. 61-83. Qed/Qae *e Qae Qt2 dune (Qed) deposits. Support thick to moderate growth of grass, Huntoon, P.W., Billingsley, G.H., and Breed, W.J., 1982, Geologic map Qes Qae cactus, and local shrubs. Thickness in valley areas, 5 to 35 ft; in of Canyonlands National Park and vicinity, Utah: Moab, Utah, Qt2 Qrf Qed/Qal Qt1 slick rock areas, 1 to 4 ft Canyonlands Natural History Association, scale 1:62,500. Qae Qt1 Qed Qt2 Qt1 Qal

120 Qal Qed/Qae Qae Qal 120 Qes Qed/Qae Qs Qal Qed/Qae *e Qae Qes Qt1 Qes Qed Qed Pc Qed/Qae Qfp Qrf Qes/Qal Qae Qt1 *e Qs Qal Qed/Qal *e Qt2 Qt1 Qed Qt1 Qt2 Qes Qae Qt1 Qed Qed Qt1 *e Qal Qed/Qal Qal Qs Qs Qt2 Pc Qrf Qae Qae Qt3 Qae Qal Qed/Qes Qt1

Pc Qed Qed Qes Qt1 Qes Qt2 Qed Qal Qed/Qae Qed/Qae Qt1 Qae *e Qt1 Qt2 Qt2 *e Qed/Qal 38 05 00 38 05 00 Qae/Qal Qs Qt1 Qaf Qed/Qt1 Qae Qed/Qt3 Qae Qt3 Qt3 Qal Qt1 Qal Pc Qs Qs Qs Qed *e Qed Qes Qes Qt2 Qrf Qed/Qae Qal Qal Qt3 Qes Qs Qt3 Qed/Qae Qs Qt2 *e Qt1 Qal Qt2 Qed Pc Qae Qrf Qt1 Qed/Qt3 Qed Qt1 Qt1 Qt3 Qed Qal Qes/Qae Qed/Qae Qae Qt1 Qt1 Pc Qes Qed/Qt3 Qes Pc Qae Qed Qal Qs Qed/Qae Pc Qes Qal Qt1 Qed/Qal Qt1 Qal Qed Qed/Qes Po Qt2 Qae Qed/Qae Pc Qs Qed/Qes Qfp Qes/Qae Pc Qt3 Qs Qae Pc Qae Qal/Qt3 Qes Pc Qs Qt3 Qt2 Pc Qes Qrf Qrf Qed/Qae Qt2 Qt1 Qes Qal Qt1 Qes Qes Qt2 Qfp Qed/Qal Qt2 Qes Qal Qes Qed Qal Pc Qt1 Qed/Qt1 Qae Qt1 Qt1

Qes Qfp Qal Qes/Qae 5 Qt1 Qt2 Qae Pc Qt1 Qfp Qs Qes Qes Qed Qed/Qt2/Qal Qt1 Qs Qal Qae Qed/Qes Qae 5 Qt3 Pc Qs Qed Pc Qt2 Qes Qes Qes Qed/Qae Qt1 Qes/Qae Qae Qt3 4 Qes Qed Po 0 5 Qt1 Qae Qal/Qt3 40 Qt2 Qed/Qes 40 Qes Qt2 Qed/Qal 38 02 30 Qes 20 38 02 30 Qes Qfp Qal Qed Qal Qt1 Qae Qes Qed/Qt2 Qt2 Qed Qt2 Pc Qf2 Qes Qed Pc Qes Qes Qal Qae Qs Qt2 Qae Qal Qae Qes Qt1 Qed/Qal Qfp Qes Qes Qt1 Pc Pc Qt2 Qes Qed Qes Qed Qal Qal Qed Qt2 Qed Qes Qed Qt1 Qes Qp/Qal Qs Qes Qes Qed Qrf Qt1 Qes Qae Qes Qt1 Qs Qt2 Qes Qes Qfp Qes Qal Qed/Qt2 Qed Qt1 Qed Qes Qes Qed Qrf Qed/Qae Qed/Qes Qfp Qal Qt2 Qed/Qt1 Qt1 Qal Qed Qes Qed/Qae Qt1 Qed Qae Qed/Qt2 Qed/Qt2 Qes Qt1 Qed/Qae Qes Qae Qes Qt1 Qes Qes Qfp Qae Qt1 Qed/Qae Qs Qed Pc Qae Qes Qed/Qae Qfp Qed Qaf Qes Qal Qt1 Qes Qal Qaf Qed/Qae Qed/Qae Qed Qs Qes Qae 15 Qes 20 Qed/Qal Qes Qed/Qal 25 Qed Qt1 Qal Qs Qt1 Qed Qal Qed Pc Qed/Qal Qes/Qae Qed/Qae Qt1 Qed/Qal 38 00 00 38 00 00 109 52 30 109 50 00 109 47 30 109 45 00 Base prepared from digital line graph (DLG) or digital raster graph (DRG) data SCALE 1:24 000 Geology mapped by George H. Billingsley, 2001 U.S. Geological Survey, The Loop and Druid Arch quadrangles, 1988 0.5 0 1 1 MILE UTAH Digital database by George H. Billingsley, Debra Universal Transverse Mercator projection L. Block, and Tracey J. Felger 1927 North American Datum 1 0.5 0 1 KILOMETER Edited by Theresa Iki Clarke 1866 Ellipsoid, Zone 12 MAP LOCATION CONTOUR INTERVAL 40 FEET Manuscript approved for publication October 23, 2002 Surficial Geologic Map of The Loop and Druid Arch Quadrangles, Any use of trade, firm, or product names in this publication is for descriptive purposes Canyonlands National Park, Utah only and does not imply endorsement by the U.S. Government. This map was printed on an electronic plotter directly from digital files. Dimensional calibration may vary between electronic plotters and between X and Y directions on the same plotter, and paper may change size due to atmospheric conditions; therefore, By scale and proportions may not be true on plots of this map.

For sale by U.S. Geological Survey, Information Services, Box 25286, Federal Center, George H. Billingsley, Debra L. Block, and Tracey J. Felger Denver, CO 80225, 1-888-ASK-USGS

2002 Digital files available on World Wide Web at http://geopubs.wr.usgs.gov