Scallop measurement in a 10m-high vadose canyon in pool sink, ease gill cave system, yorkshire dales, uk and a hypothetical post-deglacial canyon entrenchment timescale
Scallop measurement in a 10m-high vadose canyon in pool sink, ease gill cave system, yorkshire dales, uk and a hypothetical post-deglacial canyon entrenchment timescale Series Title:
Cave and Karst Science
Subjects / Keywords:
Scalloping ( local )
Ease Gill Cave System ( local ) Cave ( local ) Canyon ( local ) Karst ( local ) Scallop Measurement ( local ) Genre:
serial ( sobekcm )
Understanding the vadose entrenchment of cave passages and relating this to the evolution of the external environment and climate has been little studied in the past. This report proposes a new technique to combine measurements of the lengths of wall scallops and their adjacent passage widths to determine the history of palaeo peak water velocity and volumetric flow rate in a vadose canyon. The study site is at an active 10m-high canyon in the Pool Sink section of the Ease Gill Cave System in the Yorkshire Dales, UK. This exhibits wall scallops continuously from its roof to its floor. The Sauter mean scallop lengths vary from 0.85 to 4.81cm and the canyon widths vary from 35 to 132cm. These enable water velocities at scallop dominant discharge to be calculated as varying from 76 to 548cm/sec. Peak flow rates are estimated to vary from 104 to 3581 litres/sec. Assuming a continuous entrenchment after the local Devensian deglaciation 18,000 years ago, this gives a mean floor lowering rate of 0.55mm per year. This seems reasonable, if both chemical and mechanical erosion applied. Based on this initiation hypothesis and assuming a constant entrenchment rate through time, the peak flow rates can be correlated roughly with known climatic changes during the Lateglacial and the Holocene. Studies of more sites in the Yorkshire Dales are required to ascertain whether such estimates of peak recharges could provide reliable proxies for major climatic events. Original Version:
Cave and Karst Science, Vol. 41, no. 2 (2014-08-01).
University of South Florida Library Holding Location:
University of South Florida
This object is protected by copyright, and is made available here for research and educational purposes. Permission to reuse, publish, or reproduce the object beyond the bounds of Fair Use or other exemptions to copyright law must be obtained from the copyright holder.
print insert_link share get_app more_horiz
Download Options close
No images or PDF downloads are available for this resource.
Cras ut cursus ante, a fringilla nunc. Mauris lorem nunc, cursus sit amet enim ac, vehicula vestibulum mi. Mauris viverra nisl vel enim faucibus porta. Praesent sit amet ornare diam, non finibus nulla.
Cras efficitur magna et sapien varius, luctus ullamcorper dolor convallis. Orci varius natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Fusce sit amet justo ut erat laoreet congue sed a ante.
Phasellus ornare in augue eu imperdiet. Donec malesuada sapien ante, at vehicula orci tempor molestie. Proin vitae urna elit. Pellentesque vitae nisi et diam euismod malesuada aliquet non erat.
Nunc fringilla dolor ut dictum placerat. Proin ac neque rutrum, consectetur ligula id, laoreet ligula. Nulla lorem massa, consectetur vitae consequat in, lobortis at dolor. Nunc sed leo odio.