3" Clam Fossil Polished Jurassic Madagascar Bivalve Mollusk 150 Million Years Old

Location: Morondava River Basin, Atsimo-Andrefana region, Southwest Madagascar

Weight: 6.3 Ounces

Dimensions: 3 Inches Long, 2.1 Inches Wide, 1.4 Inches Thick

The item pictured is the one you will receive. 

This Jurassic-era clam fossil from Madagascar dates to approximately 150 million years before present, exemplifying the remarkable longevity of bivalve mollusks in the paleontological record. The specimen preserves the diagnostic morphology of Bivalvia: a bilobed shell structure with paired valves articulated by a resilient hinge ligament, operated by adductor musculature. Clams first appeared during the late Cambrian Period—over 510 million years ago—establishing a lineage of considerable evolutionary stability. As suspension feeders, these organisms maintained a sophisticated hydraulic system, drawing ambient water through their bodies to extract planktonic organisms and organic particles. This polished 3-inch specimen represents a well-preserved example of ancient marine fauna and provides valuable paleontological insight into Mesozoic benthic ecosystems.

Please be aware of the nature of fossils:

Being buried underground for millions of years under immense pressure can be quite rough. Rarely does a fossil emerge perfectly intact; most have undergone some restoration, and some are modified by humans to improve their display. Madagascar's workers do a highly professional job of unearthing and preserving these natural treasures, though natural cracks often appear on the surface. These cracks are part of the fossil's natural charm and are not flaws.