Fossilized shrimp burrows, Chaco Culture National Historical Park, New Mexico, USA.

Fossilized shrimp burrows look like squiggly iron rebar or reddish corn cobs, in Chaco Culture National Historical Park, New Mexico, USA. During the Cretaceous period (60 to 80 million years ago), the Great Inland Sea covered this area. Crustaceans known as Callianasa major built tunnels under the sand, which filled with iron deposits after the sea receded, leaving casts of their burrows. Chaco is a UNESCO World Heritage Site.

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Filename: 1403NM-0654_fossil-shrimp-burrow.jpg
Copyright: © Tom Dempsey / PhotoSeek.com
Image Size: 5393x7500 / 9.1MB; http://www.photoseek.com/; Animalia Sea Life animal desert pattern
Contained in galleries: 2014 Mar 15-Apr 09: all: southwest (UT, NM, TX), OR, CA, New Mexico: Chaco Culture National Historic Park

Fossilized shrimp burrows look like squiggly iron rebar or reddish corn cobs, in Chaco Culture National Historical Park, New Mexico, USA. During the Cretaceous period (60 to 80 million years ago), the Great Inland Sea covered this area. Crustaceans known as Callianasa major built tunnels under the sand, which filled with iron deposits after the sea receded, leaving casts of their burrows. Chaco is a UNESCO World Heritage Site.