USGS - science for a changing world

USGS Education

USGS Education Home Primary Education Secondary Education Undergraduate Education
Schoolyard Geology banner

Grain Size

Photo of man-made gray material with grains about 1 centimeter in size
Location outside Art Studio, UC Berkeley
Colors Dark Grey.
All the same color? Yes. Almost no difference between grains.
Grain Size
Minimum grain size 0.3 cm
Maximum grain size 2 cm by 1 cm
All the same size? Most grains are similar in size: about 1 cm.
Grain shapes Medium Angular
Strength Very strong.
Other Comments
photo of grey pavement with grains ranging from 0.2 centimeters to 1 centimeter in size
Location west of South Hall, UC Berkeley
Colors Most grey with a slight brownish tint.
Larger grains are darker grey with a slight bluish tint.
Very few white, milky looking grains.
All the same color? No.
Grain Size
Minimum grain size 0.2 cm
Maximum grain size 1 cm
All the same size? A pretty wide range in sizes.
Grain shapes Angular (most grains, especially the biggest ones)
Strength Very strong.
Other Comments Very rough surface.
photograph of grey pavement with smooth, rounded cobbles that are 3 to 4 centimeters in size
gray pavement with tiny rounded grains about 0.5 centimeters in size
photograph of pavement with colorful, rounded grains about 1 centimeter in size
photograph of pavement with mostly white, angular grains about 0.5 to 1 centimeter in size

Schoolyard Geology Home  •  Lesson 1  •  Lesson 2  •  Lesson 3  •  Downloads

Accessibility FOIA Privacy Policies and Notices

Take Pride in America logo USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
URL: http://education.usgs.gov/lessons/schoolyard/grainsize.html
Page Contact Information: Education Webmaster
Page Last Modified: Thursday, 06-Mar-2014 18:26:44 EST