metamorphic

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26 06, 2017

What is jade? Metamorphic rock

By |2019-09-18T07:51:37-07:00June 26th, 2017|Geology|2 Comments

What is jade? Jade rock from Alaska Jadeite and nephrite Jade is really two kinds of metamorphic rock, jadeite and nephrite, that look pretty much exactly the same. Scientists can tell them apart using chemical tests and x-rays. Like quartz, both jadeite and nephrite are chains of silicon and oxygen atoms. Why is [...]

26 06, 2017

What is metamorphic rock? Marble, slate, diamonds

By |2018-05-28T16:21:09-07:00June 26th, 2017|Geology|0 Comments

What is metamorphic rock? Slate rocks in Cascadilla Gorge, Ithaca, New York Metamorphic rocks form under pressure About 450 million years ago, some of the sedimentary rocks began to transform into metamorphic rocks. When sedimentary rocks like limestone or shale were under water, the weight of the water pressed them down. (Read more [...]