Topic: How Is Diabase Formed
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How did the diabase form in southeastern Pennsylvania?
The origin of the diabase found in Pennsylvania is related to the movement of the large, continent-sized plates dating back to the time when Africa and North America collided. The diabase found today was being rifted, or pulled apart when N... Read More »
Source: http://wiki.answers.com/Q/How_did_the_diabase_form_in_southeaster...
Where does diabase form?
Diabase is an intrusive igneous rock with the same mineral composition as basalt. It cools under basaltic volcanoes, like those at mid-ocean ridges. Diabase cools moderately quickly when magma moves up into fractures and weak zones below a ... Read More »
Source: http://home.nps.gov/goga/forteachers/diabase-faq.htm
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How Is Diabase Formed
