1 / 4

Santa Elena Canyon Stratigraphic Column

Santa Elena Canyon Stratigraphic Column. By Harriet Furton. Limestone – resistant rock Forms ridges Mid Cretaceous – deep ocean. Mesa de Anguila (US Side). Shale with limey sediment -easily erodes Forms slopes more than ridges Early Cretaceous – intermediate ocean. 740 ft.

sivan
Download Presentation

Santa Elena Canyon Stratigraphic Column

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Santa Elena CanyonStratigraphicColumn By Harriet Furton

  2. Limestone – resistant rock • Forms ridges • Mid Cretaceous – deep ocean Mesa de Anguila (US Side) • Shale with limey sediment -easily erodes • Forms slopes more than ridges • Early Cretaceous – intermediate ocean 740 ft Santa Elena Limestone • Cherty, grey limestone - resistant • Forms ridges • Early Cretaceous – deep ocean Uplift Sue Peaks formation 75-250 ft Drop • Early Cretaceous – deep ocean 350-475 ft Del Carmen Limestone • Sandstone • Early Cretaceous – shallow ocean Telephone Canyon Formation • Hard limestone • Early Cretaceous (110 mya)– deep ocean 75 ft Maxon Formation Glen Rose Limestone Rio Grande Level Terlingua Fault Glen Rose Limestone Normal fault due to a NW-SE crustal extension in the Tertiary Period, around 26 million years ago

  3. Chert- some algae, diatoms, are able to extract silica out of water and incorporate into their exoskeletons. After dying, their exoskeletons accumulates at the bottom of the ocean and with time it lithifies.

  4. Resources • Spearing, Darwin. Roadside Geology of Texas. Missoula:Mountain Press Publishing Company, 1998. • http://geology.com/ • http://tin.er.usgs.gov/geology

More Related