Ross Mitchell (@rossmitchellgeo) 's Twitter Profile
Ross Mitchell

@rossmitchellgeo

Geophysicist. Professor, Institute of Geology and Geophysics, Chinese Academy of Sciences (IGGCAS). Beijing, China.

ID: 1535929880352698368

linkhttp://sourcedb.igg.cas.cn/cn/zjrck/201912/t20191219_5460988.html calendar_today12-06-2022 10:20:29

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Ross Mitchell (@rossmitchellgeo) 's Twitter Profile Photo
Ross Mitchell
@rossmitchellgeo

8 months ago

Nearly 4 billion years old.. one of Earth’s oldest rocks. Amazing layering, but some mafic minerals and has suffered amphibolite grade metamorphism.. so.. POLL: a) Earth’s oldest sedimentary rock or b) Not sedimentary 🪨 🌍 💯 🤓

Nearly 4 billion years old.. one of Earth’s oldest rocks. Amazing layering, but some mafic minerals and has suffered amphibolite grade metamorphism.. so.. POLL: a) Earth’s oldest sedimentary rock or b) Not sedimentary 🪨 🌍 💯 🤓