Files

Download

Download Full Text (1.5 MB)

Publisher

National Cave and Karst Research Institute

Publication Date

November 2013

Notes

Michael E. Wiles Jewel Cave National Monument 11149 US Highway 16 Custer, SD, 57730, USA Mike_Wiles@nps.gov AbstractWith more than 270 km (168 miles) of mapped cave passages, Jewel Cave is the third longest cave in the world. The passages are beneath an area of 775 ha (3 mi2), located almost entirely within the Hell Canyon drainage basin. The canyon itself is situated in the bottom of a south-plunging syncline and most of the cave passages are located within the east limb. A down-dip cross section shows the cave passages assuming the shape of an elongate lens, located just below the Pahasapa/Minnelusa contact. The lower boundary is a maximum of 75 m (250 feet) below the contact, but thins at each end, where the permeable, basal Minnelusa sandstone is exposed. Based on these observations, a conceptual model has been created to portray cave development as the result of local groundwater movement in geologically recent time. The apparent recharge was in the Pass Creek and Lithograph Canyon areas, and the discharge was in Hell Canyon. Groundwater initially moved through a shallow confined aquifer comprised of the basal Minnelusa sandstone, which was initially confined by the underlying Pahasapa Limestone and an overlying Minnelusa limestone. Although Laramide fractures provided secondary porosity, there is no evidence of sufficient connectivity to provide landscape-scale permeability. As water from the sandstone circulated into the discontinuous fractures of the Pahasapa, dissolutional enlargement integrated them to form the system of interconnected cave passages known today. The model precludes the need for direct recharge from rainfall, hydrothermal waters rising from below, or prior development of a Mississippian karst. Open Access - Permission by Publisher See Extended description for more information.

Description

1 online resource

Type

Article

Genre

Serial publications

Identifier

K26-03246

Share

COinS
 
 

To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.