August 2002

The fossil of the month


In order to return this site more animated, while waiting to present boards of more complete series to you, we will make you discover each month a different fossil from our area.

Identification sheet

Phylum :

Porifera

Class :

Demosponges

Family :

Hallirhoidae

Genus :

Hallirhoa

Species :

costata (Lamouroux)

Stage :

Cenomanian

Formation:

Craies et marnes glauconieuses

Brehm, 1908

Hallirhoa costata (Lamour.)

This "star" sponge is found in the marly chalk rocks of the upper Cretaceous.

cm