Two Medicine Formation
Geological formation in north-west Montana, rich in dinosaur fossils. A setting in Anders Ericsson & Robert Pool’s “Not All Practice Makes Perfect”: Montana outcropping where Chin identified dinosaur coprolites with dung beetle burrows.
At a glance
| Source | Author | Role | In one line |
|---|---|---|---|
| Not All Practice Makes Perfect | Anders Ericsson & Robert Pool | setting | Montana outcropping where Chin identified dinosaur coprolites with dung beetle burrows |
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Not All Practice Makes Perfect — Anders Ericsson & Robert Pool (2016)
Source: Original · Readwise highlight
They were working with fossils found in Montana’s Two Medicine Formation, a sandstone outcropping that Horner was exploring.
- Role: setting
- In the article: While working for Jack Horner, Karen Chin studied blobby deposits found among Maiasaura bones, nests and eggs at this outcropping. She confirmed them as coprolites containing dung beetle burrows and conifer plant material.
- Why it matters: The site produced her first coprolite identification and the first evidence of dung beetle activity before the K-Pg extinction.