Also known as Concordia Hadrosaur Site, CHS, SRHS

Where: Corson County, South Dakota (45.5° N, 101.6° W: paleocoordinates 51.3° N, 75.2° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Little Beaver Creek Member (Hell Creek Formation), Late/Upper Maastrichtian (70.6 - 66.0 Ma)

• bed-level stratigraphic resolution

Environment/lithology: crevasse splay; fine-grained, medium, silty mudstone

Size classes: macrofossils, mesofossils, microfossils

Preservation: mold/impression

Collected by K. Olson, Nellermoe in 1993–2003, 2010–2012

Collection methods: bulk, quarrying, surface (in situ), mechanical,

• Ullmann et al. 2017: "Excavation at the site began upon its discovery in 1993 by a collaboration between private land owners, Concordia College, and Minnesota State University-Moorhead. Concordia continued annual summer excavations at SRHS through 2003, collecting a total of more than 4,000 bones. The site was hence initially named the Concordia Hadrosaur Site, and was published with this name in a stratigraphic report (Colson et al. 2004). However, later investigations of land ownership boundaries found that two of the three excavations performed by Concordia crews actually took place on land owned by the Standing Rock Sioux Reservation. Accordingly, fossils collected in these first 11 years were split between collections of the Biology Department of Concordia College in Moorhead, Minnesota, and the Paleontology Department at the headquarters of the Standing Rock Sioux Reservation in Fort Yates, North Dakota. In 2016, SRHS bones under the care of Concordia College (studied herein) were transferred to the vertebrate paleontology collection of the North Dakota Heritage Center and State Museum in Bismarck, North Dakota.

•After a six year hiatus of excavations, in 2010 the Standing Rock Paleontology Department (SRPD) reinitiated annual summer excavations at the eastern end of the bluff. Via an invitation by the lead Concordia project researcher (RN), Drexel University joined the suite of programs investigating the bonebed and the head author (PVU) led a collaborative expedition between Drexel, Concordia, and the Standing Rock Reservation to the site in the summer of 2012. As all excavations since 2010 (including our collaborative dig in 2012) have been pioneered by the SRPD and Standing Rock reservation staff, we have renamed the bonebed the Standing Rock Hadrosaur Site in honor of their ardent support."

Primary reference: R. Gould, R. Larson, and R. Nellermoe. 2003. An allometric study comparing metatarsal II's in Edmontosaurus from a low-diversity hadrosaur bone bed in Corson Co., S. D. Journal of Vertebrate Paleontology 23(3, suppl.):56A [M. Carrano/M. Carrano]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 47034: authorized by Matthew Carrano, entered by Matthew Carrano on 01.02.2005

Creative Commons license: CC BY (attribution)