Abstract
At a locality on Barton Creek, near Austin, Texas, the stream flows across horizontal layers of alternating hard and soft limestone. The bed-rock channel is incised by a number of long parallel grooves whose smoothed surfaces and U-shaped profiles are interpreted as a result of corrasion. On higher benches similar grooves occur at levels not now reached by the water of the stream, which are now being corroded by standing water, resulting in pitting of their smooth surfaces and in the formation of flat-floored, steep-walled basins known as tinajitas or etched potholes. The origin of the tinajitas is discussed. It is concluded that the features described are a result of the downward cutting of a youthful stream in a semi-arid climate, with a change from corra-sive work to corrosive work on the valley-side benches as the stream cuts below them.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
