Title: Basin
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2- Basin Range Province (extended terrain caused
by stretching of Earths crust)
- Great Basin (internally drained landscape)
3 Sierra Nevada
Mojave Desert
Transverse Ranges
4Soda Dry Lake
Barstow
Mojave River headwaters
Landsat TM Image Mojave River Drainage
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8Mojave Tui Chub (Gila bicolor mojavensis)
Descendents of the seed population located at
Mojave Chub Spring
- Only surviving native fish of
the Mojave River drainage - Survived hybridization with introduced Arroyo
Chub in isolated pool at Soda Springs - Declared endangered in 1970 (federal) and 1971
(state).
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13Ancient landmass of Rodinia in Precambrian Time
Nov. 17th
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19End of Paleozoic Era December 11th
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21- Image late Permian corals from Bird Springs
Formation (Providence Mtns.) - Also present brachiopods, fusilinids, echinoids
crinoids - Implied environment Shallow (lt50m), warm
marine seas of normal salinity
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24Middle Mezozoic Era December 19th
25Early Triassic North America December 13th.
Drawing courtesy or Dr. Norman Meek, C.S.U. San
Bernardino
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29- Recent Landscape Changes
- Extension (stretching) of region creates Basin
and Range Province - last 35 million years (Dec.
29 - now) - Volcanic activity
- Woods Mountain Volcanic Center erupts 16.4-15.8
Ma (Dec. 30, 448-600 PM) - Cima Volcanic Field erupts 7.5 Ma-10 Ka (Dec. 31,
943 AM - Dec. 31, 115852 PM) - Latest uplift of Sierra Nevada and Transverse
ranges set stage for rain-shadow desert
conditions (last 3 million years - Dec. 31, 620
PM to now) - Climate oscillations throughout Pleistocene Epoch
from Ice Ages to interglacial periods ( 2 Ma -
11Ka starts Dec. 31, 812 PM ) - Last 11,000 years (Dec 31, 115845 PM to now)
is called Holocene Epoch (latest interglacial
period) - when Mojave desert comes to current
form.
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33 Late Wisconsin Ice Age ( 2minutes to
midnight, December 31) Humans likely present,
Great Basin lakes full, erosion of mountains.
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36Playas lt2
Mountains/hills 30
Rivers/Washes lt1
Alluvial fans/bajadas 65
Dunes lt1
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48 Biological Attributes
49Sidewinder Rattlesnake Crotalus cerastes
50Giant Hairy Scorpion (Hadrurus arizonensis)
largest in North America
51Lytta magister DO NOT TOUCH THIS ONE !
52Desert Woodrat Neotoma lepida
53Ringtail Bassariscus astutus
54Grey Fox Urocyon cinereoargenteus, aka Vicente
55Desert Big-Horn Sheep Ovis canadensis nelsoni
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