View in Rock Hill Quarry

Pennsylvania Geological Survey - Historical Photographs

About

Subject

Nonmetallic Mineral Resources

Description

View in Rock Hill Quarry, West Manayunk. Wissahickon Formation

Creator

Ashley, Geo. H. (George Hall), 1866-1951

Date

1935-05-31

Location Covered

Montgomery

Type

Image

Original Format

Photographs

Digital Format

image/jpeg

Source

5522

Note

View taken at west end of quarry where structure is northern limb of anticline pitching east. The bes here strike nearly E-W and dip 25 to 30 degrees N. They vary in thickness from three inches to nearly two feet and separate easily on the bedding which facilitates quarrying. Used for building stone, flagstone, etc.
The rock is rather fine-grained, composed of quartz, oligoclase-andesine, biotite and muscovite, with accessory apatite, magnetite and zircon. The texture is crystalloblastic with the mica well oriented during recrystallization.

Relation

321.1

Rights

http://rightsstatements.org/vocab/NoC-US/1.0/

Contact

For further information contact RA-pagslibrary@pa.gov or call 717-702-2020.

Contributing Institution

Pennsylvania Geological Survey

Sponsorship

This Digital Object is provided in a collection that is included in POWER Library: Pennsylvania Photos and Documents, which is funded by the Office of Commonwealth Libraries of Pennsylvania/Pennsylvania Department of Education.