{ "id": "c812619e2c258b380fdb24d073930f3819051119d5c34fdcaf2eb80b25886824", "pubkey": "c230edd34ca5c8318bf4592ac056cde37519d395c0904c37ea1c650b8ad4a712", "created_at": 1749217995, "kind": 9802, "tags": [ [ "r", "https://cdn.serc.carleton.edu/files/research_education/mt_geoheritage/sites/augusta_choteau/mudge_1972_usgs_prof..pdf" ], [ "textquoteselector", "-", "(See measured sec-tions 11-13.) ", " Locally on the east side of Han" ], [ "textpositionselector", "149386", "149919" ] ], "content": "These beds are light to medium gray andcharacteristically weather a very light gray. Many ofthe lower beds contain thick lenses of encrinite, some ofwhich are coarsely crystalline. Even though these arepure dolomite, the relict structure of the crinoid col-umnals is preserved. Some of the dolomite beds containwell-preserved silicified corals and brachiopods, suggest-ing that dolomitization followed silicification. Light-gray to gray-brown chert nodules and quartz- andcalcite-lined geodes are common, especially in the upperpart.", "sig": "c4315d02e2bca0ab49316efb9f0ec930be0675732e521e84657749f5d83e1ce301c10b25d7b21882c8f6ec872018a83c12b7423f5d2df4b0a38fb8c94c03bc9e" }