Geology

[equalsmcsquared.livejournal.com]

Good morning. I'm not feeling particularly creative today, so I have elected to bore you. *a pleasant smile* Coffee and doughnuts are in the back next to the roll sheet.

Metamorphic rocks are sedimentary or igneous rocks that have been altered by heat and/or pressure. As they are derived from previously existing igneous, sedimentary or even metamorphic rock, their appearance is variable. They are identified by the types of minerals they contain and their texture. Thermally metamorphosed rocks occur bordering igneous intrusions, which altered the surrounding rock originally because of their intense hear, resulting also in the formation of new minerals such as andalusite and garnet. Regionally metamorphosed rocks occur in the roots of mountain ranges, where intense pressures and high temperatures formed platy minerals (e.g. mica) and high-pressure minerals (e.g. staurolite).

In today's lab, you will be listing the individual properties of each sample I'm placing before you. And excellent job on Monday's assignment--these rocks will probably look quite familiar.

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[chasingangela]

Angela joins Phoebe at their table. "We can still talk if you want to," she says softly.