This is really bizarre! Fascinating story and great pics. Thanks for
sharing!
Mark Ross
-----Original Message-----
From: Mike Flannigan
Sent: Saturday, June 20, 2020 3:53 PM
To: Cavetex
Subject: [Texascavers] Gypsum Mine
Cave, or mine, opens up in your front yard:
https://www.boredpanda.com/sinkhole-south-dakota-black-hawk-old-gypsum-mine/
Mike
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