Coastal & Marine Geology InfoBank

USGS CMG InfoBank: Muscovite and Feldspar


Dictionaries:	The USGS and Science Education USGS Fact Sheets Topics Keywords Data Dictionary Metadata Dictionary Computer Terminology Digital Formats
InfoBank Terms:	Activity ID activity overview crew formal metadata lines metadata NGDC port stops project/theme region ship stations time virtual globe year
Data Types:	bathymetry geodetic positioning gravity ground penetrating radar imagery LIDAR magnetics metering equipment navigation samples seismic definitions disclaimer
Data Formats:	ARC coverage E00 FGDC metadata gridded/image imaging material scattered/swath Shapefile vector/polygon

Comment: 10:24 - 10:57 (00:33)

Source: Annenberg/CPB Resources - Earth Revealed - 12. Minerals: The Materials of Earth

Keywords: "James Sadd", muscovite, feldspar, cleavage, "crystal structure", "physical property", "mineral identification", mineral, color

Our transcription: Look at this silver mineral called "muscovite".

It looks almost like a stack of paper with the individual sheets flaking apart quite easily.

The tendency of minerals to break along flat planes is called "cleavage", and cleavage is a property that's determined by the crystalline structure of the mineral.

This pink mineral is "feldspar".

Unlike muscovite, it has cleavage, but there are two directions of cleavage about 90 degrees to one another.

Geology School Keywords

Skip footer navigational links

InfoBank Menlo Park & Santa Cruz Centers St. Petersburg Center Woods Hole Center Coastal and Marine Geology Program Geologic Information Ask-A-Geologist USGS Disclaimer

Accessibility FOIA Privacy Policies and Notices

U.S. Department of the Interior | U.S. Geological Survey
URL: http://walrus.wr.usgs.gov/infobank/programs/html/school/moviepage/11.01.14.html
Page Contact: InfoBank staff
Page Last Modified: Tue Dec 16 06:30:54 PST 2008 (wcs)

Accessibility FOIA Privacy Policies and Notices
U.S. Department of the Interior \| U.S. Geological Survey URL: http://walrus.wr.usgs.gov/infobank/programs/html/school/moviepage/11.01.14.html Page Contact: InfoBank staff Page Last Modified: Tue Dec 16 06:30:54 PST 2008 (wcs)