by John Hopkins | Tue, 29 Sep 2020 16:09:00 -0600 | image
Martin Marietta Aggregates with the famous I-70 roadcut cutting through Dinosaur Ridge in the background in Jefferson County, Colorado, September ©2020 hopkins/neoscenes.
by John Hopkins | Sun, 16 Jun 2019 12:24:00 -0600 | image
The K–Pg (Cretaceous-Paleogene) boundary exposure at Longs Canyon in Trinidad Lake State Park, Colorado, shows an abrupt change from dark- to light-colored rock, October ©2019 hopkins/neoscenes.
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