Eastern Mojave Vegetation Fish Creek Wash, San Diego County, California  
 

Tom Schweich  

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Literature Cited
 Through Split Mountain.
  Upper portion of wash

Other articles: Loop Wash Jeep Trail at Fish Ck Wash W  

Junction: Loop Wash Jeep Trail

Other articles: Field Notes 21-Apr-08
Full Size ImageField Trip Stop 3-7. Yuha Formation.  

Field Trip Stop 3-7 Yuha Formation or member of Deguynos Formation.

Other articles: Loop Wash Jeep Trail at Fish Ck Wash E  

Junction: Loop Wash Jeep Trail

Other articles: Field Notes 21-Apr-08
Full Size ImageField Trip Stop 3-6. Colorado River delta rythmites  

Field Trip Stop 3-6 Colorado River delta rhythmites.

Other articles: Field Notes 21-Apr-08
Full Size ImageFossil Reef Interpretive Sign  

Field Trip Stop 3-5. Coyote Mountain Clays or Mud Hills member of the Deguynos Formation

Other articles: Field Notes 21-Apr-08
Full Size ImageField Trip Stop 3-4. First Evidence of Ancestral Colorado River  

Field Trip Stop 3-4. First evidence of the ancestral Colorado River.

Literature Cited:
- Dorsey, Rebecca J., Amy Fluette, Kristin McDougall, Bernard A. Housen, Susanne U. Janecke, Gary J. Axen, and Catherine R. Shirvell, 2007.

Other articles: Field Notes 21-Apr-08 21-Apr-08
Full Size ImageField Trip Stop 3-3. Srutzstrom  

Full Size Image
Field Trip Stop 3-3. Base of the Latrania Formation
Field Trip Stop 3-3. Base of the Latrania Formation, Imperial Group.

 

 

Literature Cited:
- Dorsey, Rebecca J., Amy Fluette, Kristin McDougall, Bernard A. Housen, Susanne U. Janecke, Gary J. Axen, and Catherine R. Shirvell, 2007.

Locations: Split Mountain.  

Split Mountain

Late Miocene to early Pliocene deposits at Split Mountain Gorge, California, preserve a record of basinal response to changes in regional tectonics, paleogeography, and evolution of the Colorado River. The base of the Elephant Trees Formation, magnetostratigraphically dated as 8.1 ± 0.4 Ma, provides the earliest well-dated record of extension in the southwestern Salton Trough. The oldest marine sediments are ca. 6.3 Ma. The nearly synchronous timing of marine incursion in the Salton Trough and northern Gulf of California region supports a model for localization of Pacifi c–North America plate motion in the Gulf ca. 6 Ma. The fi rst appearance of Colorado River sand at the Miocene-Pliocene boundary (5.33 Ma) suggests rapid propagation of the river to the Salton Trough, and supports a lake-spillover hypothesis for initiation of the lower Colorado River (Dorsey, et al., 2007, authors' abstract).

Other articles: Field Notes 21-Apr-08
Full Size ImageField Trip Stop 3-2. Elephant Trees Conglomerate.  

Field Trip Stop 3-2. Elephant Trees Conglomerate, "Red Rock," sturzstroms, and Split Mountain Anticline.

 

 

Other articles: Field Notes 21-Apr-08

Locations: Fish Creek Campground.
Full Size ImageFish Creek Campground  

Fish Creek Campground

 

Other articles: Field Notes 21-Apr-08
Full Size ImageField Trip Stop 3-1. Fish Creek Gypsum  

Field Trip Stop 3-1. Fish Creek Gypsum, celestite, base of the Imperial Group, and Elephant Trees Conglomerate.

Other articles: Split Mountain Road. at Fish Creek  

Junction: Split Mountain Road

 

 

   

Literature Cited

  A list of all literature cited by this web site can be found in the Bibliography.
  Dorsey, Rebecca J., Amy Fluette, Kristin McDougall, Bernard A. Housen, Susanne U. Janecke, Gary J. Axen, and Catherine R. Shirvell. 2007. Chronology of Miocene–Pliocene deposits at Split Mountain Gorge, Southern California: A record of regional tectonics and Colorado River evolution. Geology. 35(1):57-60. {TAS-pdf}
If you have a question or a comment you may write to me at: tas4@schweich.com I sometimes post interesting questions in my FAQ, but I never disclose your full name or address.  


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Date and time this article was prepared: 12/12/2017 5:49:00 PM