Valeria

Valeria_SCC34_website

Valeria is found in rocks deposited in many different environments over almost a billion years of time in the Proterozoic, from the late Paleoproterozoic to the Neoproterozoic. It is easily recognized by its corduroy-like concentric striations on its surface (most visible on this specimen at center left). Valeria was also one of the first microfossil types identified in the Chamberlain Formation by Robert Horodyski. I’ve found Valeria in newly discovered core sections of the lower Chamberlain Formation from the Fort Missoula Core Shed and outcrops of the Greyson Formation. It has limited biostratigraphic and biochronological utility, but its relative abundance in the Greyson and Chamberlain Formations does indicate some degree of paleoenvironmental differentiation.

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s