Boxwork formations in Wind Cave hang from the ceiling, yet are much older than the cave itself! They consist of calcite that hardened in the cracks of the limestone. After the cave formed, carbonic acid dissolved the limestone, but left the calcite behind.

Author

Matthew P. Hunt

Created on

Sunday 5 August 2012

Posted on

Saturday 25 May 2013

Tags

Boxwork, Cave formations, Caves, smc P-FA 50mm F1.4, Speleothems

Albums

• Travel / South Dakota 2012

EXIF Metadata

Model

PENTAX K10D

DateTimeOriginal

2012:08:05 10:29:34

ApertureFNumber

f/1.7

ExposureTime

1/10

ISOSpeedRatings

400

FocalLength

5000/100