Geologic Map of the Rainbow Basin Fault Area: Explanation Barstow, California Correlation of Map Units and Map Location

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Geologic Map of the Rainbow Basin Fault Area: Explanation Barstow, California Correlation of Map Units and Map Location R2W R1W 35.03818 N 35.03788 N -117.04461 W -117.02566 W Recent Alluvium 12 Qal 90 MN 20 Qal Mp Mbol 83 Upper member, 12° 28’ E 17 Mbs D 17 Skyline member Mbb Qal Skyline Tu 29 Middle member U D Unk Mbou Mbou 58 50 Above Oreodont 44 32 51 58 48 61 Oreodont Tu 42 52 40 41 39 15 Middle member 41 41 33 U 27 Mbol Mbol Below Oreodont 22 21 21 43 9 34 32 17 25 34 35 31 Rak Tu 33 30 16 27 36 24 26 17 30 30 19 Lowest member Qal 22 Mbb 31 Owl Conglomerate Mbou Mbol 25 Red Tu 39 39 47 Mp Miocene Unmapped 44 Pickhandle Fm. Unk Portions T11N T11N 32 24 Mbou Description of Map Symbols 26 26 Contact Folds Fault Scarp 31 Dashed where appropriate Syncline, anticline Ball on downthrown side Mbol Qal Major & Minor Faults Fault Township & Range Dashed where inferred: Low angle strike slip Section lines and Mbol Stratigraphic throw as indicated (example is left lateral) number D 8 U 30 10 D 47 30 21 56 39 25 30 30 U Unk 32 45 Attitude of Bedding Attitude of Fault Fault Zone or Shear Zone Mbb 42 7 8 Width to scale 32 38 53 31 31 26 67 D Mp U Mp Description of Map Units 35.01784 N 35.01635 N -117.04673 W R2W R1W -117.02469 W Qal ALLUVIUM - Silt, sand, and gravel along streams and erosional 250 0 250 500 750 1000 m features. Some large cobbles and boulders near stream axis. 1000 0 1000 2000 3000 4000 ft Contour interval 25 ft UPPER MEMBER (North Limb) - Largely ne-grained lacustrine shale, Datum is mean sea level Mbs mustone, and claystone. Light gray-brown to rusty yellow, poorly consolidated and sorted conglomerate and sandstone, mostly granitic and volcanic detritus; some limestone, sandstone and tu. 3300 ft UPPER MIDDLE MEMBER - Mostly sandstone separated by beds of Mbou claystone and limestone; brown tuaceous bentonite and white Cross Section Description limestone makes up the lower boundary: Oreodont Tu. 3200 ft LOWER MIDDLE MEMBER - Green and gray sandstone with yellow and 3100 ft Mbol greenish-gray claystone with mostly lacustrine sediment towards its base and progressively more sandstone towards its summit. Mbb 3000 ft OWL CONGLOMERATE MEMBER - Conglomerate, gray to green-gray, Qal Mbb crudely and locally cross-bedded, poorly consolidated, composed of Mbs subrounded cobbles and boulders. Unconformable contact at base 2900 ft with Pickhandle Formation. Mbol Mp 2800 ft Mp PICKHANDLE FORMATION Mbb Mp Mbou ? ? 2700 ft 11°NE 1000 ft 2000 ft 3000 ft 4000 ft 5000 ft 6000 ft 7000 ft By Caleb Stanton 06/03/12.

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Geologic Mapping, Rainbow Basin Field Trip Information
FIELD TRIP 1 Geologic Mapping, Rainbow Basin (Vicinity Barstow, California) Ge 101 Fall Quarter 2013 General Information: We will be departing at 8:00 a.m. on Friday, November 1 from the parking area in front of Arms ("Arms Circle"). Please arrive by 7:45 so there is time to get the trucks packed etc. Attached is a map of how to get to the field area. We will be staying in a motel in Barstow on Friday and Saturday nights (California Inn). We will depart from the motel parking lot for the field area at 8 a.m. on Saturday and Sunday mornings. We will leave the field area at 4 p.m. Sunday, and arrive back at Caltech by 7 p.m. Meals: Rainbow basin is remote and there are no options to purchase food there. We will make a brief stop at a supermarket in Barstow Friday morning to purchase lunch food, snacks and drinks. You may however opt to bring your own food and pack it in ice chests before we leave, up to and including three lunches, two breakfasts and two dinners. Prof. and TAs usually opt for breakfast at Carrows (a short drive from the motel) at 7 a.m., but the California Inn has a free breakfast. There are lots of restaurant options for dinner, from McDonalds up to various moderately priced restaurants. If you opt to purchase lunch food Friday morning in Barstow and otherwise eat in restaurants, you should budget about $80-100. Report: The field report will be an inked and colored geologic map with a map legend and cross section, plus a short description of the geologic history of the map area, listing events depicted on the geologic map, plus additional information compiled in Lab.
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Mojave Miocene Robert E. Reynolds, editor California State University Desert Studies Center 2015 Desert Symposium April 2015 Front cover: Rainbow Basin syncline, with rendering of saber cat by Katura Reynolds. Back cover: Cajon Pass Title page: Jedediah Smith’s party crossing the burning Mojave Desert during the 1826 trek to California by Frederic Remington Past volumes in the Desert Symposium series may be accessed at <http://nsm.fullerton.edu/dsc/desert-studies-center-additional-information> 2 2015 desert symposium Table of contents Mojave Miocene: the field trip 7 Robert E. Reynolds and David M. Miller Miocene mammal diversity of the Mojave region in the context of Great Basin mammal history 34 Catherine Badgley, Tara M. Smiley, Katherine Loughney Regional and local correlations of feldspar geochemistry of the Peach Spring Tuff, Alvord Mountain, California 44 David C. Buesch Phytoliths of the Barstow Formation through the Middle Miocene Climatic Optimum: preliminary findings 51 Katharine M. Loughney and Selena Y. Smith A fresh look at the Pickhandle Formation: Pyroclastic flows and fossiliferous lacustrine sediments 59 Jennifer Garrison and Robert E. Reynolds Biochronology of Brachycrus (Artiodactyla, Oreodontidae) and downward relocation of the Hemingfordian– Barstovian North American Land Mammal Age boundary in the respective type areas 63 E. Bruce Lander Mediochoerus (Mammalia, Artiodactyla, Oreodontidae, Ticholeptinae) from the Barstow and Hector Formations of the central Mojave Desert Province, southern California, and the Runningwater and Olcott Formations of the northern Nebraska Panhandle—Implications of changes in average adult body size through time and faunal provincialism 83 E. Bruce Lander Review of peccaries from the Barstow Formation of California 108 Donald L.
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Desert Discovery Park Concept Plan
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Investigation Into Strath Terrace Production in the Mud Hills, California
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