Tag Archives: meteorites

Impact and Geology: spherules rule

Posted on April 22, 2011 by Metageologist
Metageologist

One of the most striking changes in Earth Science in the last 20 years has been the way meteorite and associated impacts (or bolides and astroblemes, if you prefer) are viewed by Geologists. In the dark days of the 1990s … Continue reading →

Categories: planets, Rocks & minerals

Impacts and Geology: deep peace?

Posted on March 22, 2011 by Metageologist
Metageologist

Metamorphic rocks typically come from deep in the earth and form slowly. Simple physics shows that transferring heat into large volumes of rock (a key driver of many types of metamorphism) takes millions of years. Rocks that form the deep … Continue reading →

Categories: planets, Rocks & minerals

Impacts and Geology: from lahar to suevite

Posted on January 26, 2011 by Metageologist
Metageologist

As I’ve written before, the last 30 years has seen a big change in the way Geologists think about the Earth; this planet of ours does not sit in isolation in the Universe but is frequently hit and changed by meteorites … Continue reading →

Categories: planets, Rocks & minerals

Meteorites and Geology: big holes in the ground

Posted on January 11, 2011 by Metageologist
Metageologist

How many meteorite craters haven’t we discovered yet? Continue reading →

Categories: planets