Where: Inyo County, California (36.9° N, 118.1° W: paleocoordinates 6.8° S, 82.0° W)

• coordinate based on nearby landmark

When: Johnson Spring Formation, Caradoc (458.4 - 449.5 Ma)

• Limestone 71 feet above the base of the undifferentiated upper part of the Eureka group in the Lead Canyon Trail section.

• group of beds-level stratigraphic resolution

Environment/lithology: marine; limestone

Size class: macrofossils

Collected by R. L. Langenheim, Jr., J. A. Barnes, K. C. Delise, W. A. Ross, J. M. Stanton in 1954; reposited in the UCMP

• The senior writer visited the area with R. H. Waite in April, 1954, to ex- amine the Ordovician and Silurian section and returned in October, 1954, with the junior writers to collect data.

Primary reference: R. L. Langenheim, Jr., J. A. Barnes, K. C. Delise, W. A. Ross, and J. M. Stanton. 1956. Middle and Upper(?) Ordovician Rocks of Independence Quadrangle, California. Bulletin of the American Association of Petroleum Geologists 40(9):2081-2097 [J. Marcot/J. Marcot]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 219320: authorized by Jonathan Marcot, entered by Jonathan Marcot on 06.04.2021

Creative Commons license: CC BY (attribution)