Tag Archives: impacts

Impact and Geology: spherules rule

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?

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

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

Metageologist

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

Categories: planets