The fossil is embedded in a rough, light brown sedimentary rock matrix, likely limestone or sandstone, measuring approximately 8" x 6" inches based on the visible tile background. It contains multiple marine shell fossils, primarily brachiopods, identifiable by their ribbed, fan-like structures with concentric growth lines; one prominent specimen on the left side shows a classic bilaterally symmetrical shell about 2–3 inches wide. These fossils likely date to the Paleozoic era (541–252 million years ago), as brachiopods were abundant then, and the rock’s texture suggests a marine depositional environment.

Brachiopods, often called "lamp shells," are marine invertebrates with a rich evolutionary history spanning over 500 million years. Their evolution reflects adaptations to changing marine environments, competition, and mass extinction events. They can be found in most all areas of the world as millions of years of ancient lakes and rivers flood and receded across the land.

Hi, Fred,
Do you know where this section was excavated? Was it form the US east coast? That information could help me determine the type of specimen in the sandstone matrix. I do not believe that the example has a very high resale value; but I can certainly give you more information on it, and write up suggestions for creating a display for this fossil example, as they are all very intriguing objects of art.
Thank you, Amber