< Page:Popular Science Monthly Volume 72.djvu
This page has been proofread, but needs to be validated.
508
POPULAR SCIENCE MONTHLY

The Tiny Rill of a Spring that has already developed a Small Basin.
of the Black Hand formation, which borders the floodplains of all the valleys, a distribution made possible because the formation has an eastern dip of about twenty-five feet per mile. The springs in the Black Hand are numerous and copious, partly because of the thickness

The Black Hand Formation is generally a coarse, irregularly bedded sandstone, yielding a copious supply of spring water.
This article is issued from Wikisource. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.