Fossil Sponge - Astraeospongia meniscus - 419,000,000 Years Old rome leaving behind striking ribbons of

leaving behind striking ribbons of iron-nickel alloys known as a Widmanstätten pattern

Originally part of the Third Edition of the Mini Museum

A small information card is included

sponges are the earliest complex lifeforms on the planet

19" on the longest edge

Fossil Sponge - Astraeospongia meniscus - 419,000,000 Years Old rome leaving behind striking ribbons ofSponges are sessile filter feeders that thrive across the world's oceans. First appearing nearly 600 million years ago, sponges are the earliest complex lifeforms on the planet. This specimen is a complete 1. 5 2" Astraeospongia meniscus sponge fossil, preserved in beautiful detail. It was recovered on private land in Tennessee and dates to the Silurian Period over 419,000,000 years ago. Each specimen comes complete with an informational card that