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- Austin_Chalk abstract "The Austin Chalk is an upper Cretaceous geologic formation in the Gulf Coast region of the United States. It is named after type section outcrops near Austin, Texas. The formation is made up of chalk and marl.Dinosaur remains are among the fossils that have been recovered from the formation, although none have yet been referred to a specific genus.The Austin Chalk consists of recrystalized, fossiliferous, interbedded chalks and marls. Exposures of Austin Chalk are mainly seen in quarries, roadcuts, and stream beds where the water eroded the soil. The Austin Chalk outcrops and can be seen throughout Dallas, and extends south underneath I-35 down into Austin and San Antonio. Volcanic ash layers are present in the Austin chalk, and were deposited by wind from distant erupting volcanoes around 86 mya. These eruptions occurred along a 250-mile long by 50 mile wide belt of submarine volcanoes, which are located in present day south-central Texas. This belt of volcanoes coincides with the trend of the Balcones Fault zone and is known as the Balcones volcanic province. Evidence of these ancient volcanoes is only visible in a few places since most were buried by the Austin and Taylor Group, and now are in the subsurface. The presence of this volcanism during deposition of the Austin Chalk is correlated with the Laramide orogeny. Sea level rose for conditions to be right for the deposition of the Austin Chalk, which also coincides with the maximum extent of the Cretaceous Interior Seaway. The depths of the deposition of the Austin Chalk occurred in ~250 m or 820 ft of water. The Austin Chalk is filled with micro-organism fossils known as coccoliths.".
- Austin_Chalk wikiPageID "25146130".
- Austin_Chalk wikiPageRevisionID "525223274".
- Austin_Chalk age Late_Cretaceous.
- Austin_Chalk country "U. S.".
- Austin_Chalk hasPhotoCollection Austin_Chalk.
- Austin_Chalk name "Austin Chalk".
- Austin_Chalk region "Gulf Coast".
- Austin_Chalk type Formation_(stratigraphy).
- Austin_Chalk subject Category:Austin,_Texas.
- Austin_Chalk subject Category:Chalk.
- Austin_Chalk subject Category:Cretaceous_geologic_formations.
- Austin_Chalk subject Category:Geology_of_Texas.
- Austin_Chalk type Abstraction100002137.
- Austin_Chalk type Arrangement107938773.
- Austin_Chalk type CretaceousGeologicFormations.
- Austin_Chalk type Formation108426461.
- Austin_Chalk type Group100031264.
- Austin_Chalk comment "The Austin Chalk is an upper Cretaceous geologic formation in the Gulf Coast region of the United States. It is named after type section outcrops near Austin, Texas. The formation is made up of chalk and marl.Dinosaur remains are among the fossils that have been recovered from the formation, although none have yet been referred to a specific genus.The Austin Chalk consists of recrystalized, fossiliferous, interbedded chalks and marls.".
- Austin_Chalk label "Austin Chalk".
- Austin_Chalk sameAs m.09gkr7z.
- Austin_Chalk sameAs Q4823017.
- Austin_Chalk sameAs Q4823017.
- Austin_Chalk sameAs Austin_Chalk.
- Austin_Chalk wasDerivedFrom Austin_Chalk?oldid=525223274.
- Austin_Chalk isPrimaryTopicOf Austin_Chalk.