Community College (LRCCD)
Geology & Earth Science Instructor: Arthur Reed, P.G.
Happy Fossil Friday!
Friday February 12, 2021
Scaphites equalis coverhamensis
This little shell belongs to Scaphites equalis coverhamensis, a Cretaceous ammonite that was widespread. This sample was found in Port Awanui, Raukumara Peninsula, New Zealand.
This specimen is 103.3 - 95.2 million years old and is part of an assemblage of methane-seep fauna. It is the first record of Cretaceous seep deposits from the Southern Hemisphere.
While seep fauna are geographically widespread throughout the oceans, they are largely restricted to chemical-rich environments created by methane seeps. They live in symbiosis with bacteria which use seep chemical compounds as their energy source. The scale bar is 1 cm.
NOTE: Methane seeps have recently been in the news. Methane seeps have been a natural part of Earth’s environment at least since the Mesozoic.
Adapted from GNS Science