Rock+Density

=The Geology Group: How to Measure Rock Density=

Here's how to do it....

 * [[image:P1350157.JPG]]

1. Tie a piece of string around your rock. Weigh the rock.
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2.Slowly sink your rock in a container of water filled to the level of the spout.
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measuring jug.
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 * [[image:P1350151.JPG]]

4. Use a measuring cylinder to measure the volume of the water in the jug.
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surface tension between the glass and the water.
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below. One of our rocks was Basalt, the other was Andesite.
|| =Table of Rock Densities (grams/cubic centimetre)=
 * || Andesite ||  || 2.5 - 2.8 ||   ||
 * || Basalt ||  || 2.8 - 3.0 ||   ||
 * || Coal ||  || 1.1 - 1.4 ||   ||
 * || Diabase ||  || 2.6 - 3.0 ||   ||
 * || Diorite ||  || 2.8 - 3.0 ||   ||
 * || Dolomite ||  || 2.8 - 2.9 ||   ||
 * || Gabbro ||  || 2.7 - 3.3 ||   ||
 * || Gneiss ||  || 2.6 - 2.9 ||   ||
 * || Granite ||  || 2.6 - 2.7 ||   ||
 * || Gypsum ||  || 2.3 - 2.8 ||   ||
 * || Limestone ||  || 2.3 - 2.7 ||   ||
 * || Marble ||  || 2.4 - 2.7 ||   ||
 * || Mica Schist ||  || 2.5 - 2.9 ||   ||
 * || Peridote ||  || 3.1 - 3.4 ||   ||
 * || Quartzite ||  || 2.6 - 2.8 ||   ||
 * || Rhyolite ||  || 2.4 - 2.6 ||   ||
 * || Rock Salt ||  || 2.5 - 2.6 ||   ||
 * || Sandstone ||  || 2.2 - 2.8 ||   ||
 * || Shale ||  || 2.4 - 2.8 ||   ||
 * || Slate ||  || 2.7 - 2.8 ||   ||