Ele. 250-415 ft. Milocene period 2-66 million years ago.[img src=http://www.debclltx.com/wp-content/flagallery/THC_geology/thumbs/thumbs_img_1652.jpg]160Hwy 90, Navasota to Andeson
Hwy 90, Navasota to Andeson, Ele. 250-415 ft. Milocene period 2-66 million years ago.[img src=http://www.debclltx.com/wp-content/flagallery/THC_geology/thumbs/thumbs_img_1654.jpg]200Hwy 90, Navasota to Andeson
Hwy 90, Navasota to Andeson, Ele. 250-415 ft Milocene period 2-66 million years ago.[img src=http://www.debclltx.com/wp-content/flagallery/THC_geology/thumbs/thumbs_img_4939.jpg]340Concretion McKinney Roughs Park, LCRA
A naturally occurring rock of concrete mixture which forms in hollows and crevices as the appropriate minerals seep into a void. https://www.dmr.nd.gov/ndgs/ndnotes/concretions/concretions.asp[img src=http://www.debclltx.com/wp-content/flagallery/THC_geology/thumbs/thumbs_img_4938.jpg]190
[img src=http://www.debclltx.com/wp-content/flagallery/THC_geology/thumbs/thumbs_IMG_2295A.jpg]1450 IH 10 near Sonora, TX
Sutton County, Elev 1900-2500 ft. Precambrian, 570 - 4,500 million tears ago.[img src=http://www.debclltx.com/wp-content/flagallery/THC_geology/thumbs/thumbs_IMG_2293A.jpg]580 IH 10 near Sonora, TX
Sutton County, Elev 1900-2500 ft. Precambrian, 570 - 4,500 million tears ago.[img src=http://www.debclltx.com/wp-content/flagallery/THC_geology/thumbs/thumbs_IMG_2296A.jpg]560 IH 10 near Sonora, TX
Looks like an ancient river bed. Sutton County, Elev 1900-2500 ft. Precambrian, 570 - 4,500 million tears ago. [img src=http://www.debclltx.com/wp-content/flagallery/THC_geology/thumbs/thumbs_IMG_2305A.jpg]510 IH 10 near Sonora, TX
Sutton County, Elev 1900-2500 ft. Precambrian, 570 - 4,500 million tears ago.[img src=http://www.debclltx.com/wp-content/flagallery/THC_geology/thumbs/thumbs_palodurocanyona_0.jpg]180Palo Duro State Park
Randall County, Elec. 2,277 - 3,500 ft, Upper Tertiary, 2-66 million years ago. [img src=http://www.debclltx.com/wp-content/flagallery/THC_geology/thumbs/thumbs_img_0239.jpg]140Recovered by Jeff Bray at Lake Texome
[img src=http://www.debclltx.com/wp-content/flagallery/THC_geology/thumbs/thumbs_nautilusmineola-00015.jpg]160Ancient nautilus recovered by Augusts T. Bogan in Cenbtral Teas 1920's.
[img src=http://www.debclltx.com/wp-content/flagallery/THC_geology/thumbs/thumbs_img_0237.jpg]130Recovered by Jeff Bray at Lake Texome
27 April 2015
Throughout the Texas Hill Country you find examples vastly different from those found in Maine. For miles you will see cuts through ridges where thin parallel layers of sedimentary rock appear to be continuous from one section to another. These were formed when this region was under water and solids from all over the world found their way here and settled over long periods of time.
The age of the Earth is demonstrated with the many fossils that are found in these layers easily viewed along West Texas highways. For example, the ones taken along I10, just East of Sonora show long periods of quiet in the Earth’s history, seen here as compared to the upheaval seen in the Maine geology.
The abundance of oil in Texas is due to upheaval during the Pennsylvanian period (300 million years ago). In the collision of the plates forming the supercontinent Pangaea, an abundance of organic rich mudstones were pressed under the limestone, forming the oil over a long period of time. Additional formations occurred during the Permian-Devonian periods (245 million years ago).