Loose in the Lab

Petrified dinosaur p**p from the Henry Mountain in southern Utah. Found in the Morrison formation with dinosaur bones, gastroliths and tracks these coprolites formed when minerals replaced the organic matter and hardened.

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Whole Dinosaur Coprolite (P**p) from Utah • Window Cut US $34.00 Used in Collectibles, Rocks, Fossils & Minerals, Fossils

The gypsum rose forms from water-rich gypsum in semi-arid desert conditions. When it rains the water percolates down into the soil and dissolves the gypsum. Once the gypsum is in solution it is able to move easily and it collects in pockets to naturally form the roses.

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Gypsum Roses from Mexico, One Pound Lot (18-22 Roses) US $11.95 Used in Collectibles, Rocks, Fossils & Minerals, Crystals & Mineral Specimens

A stromatolite is a fossilized colony of blue-green algae. The algae, which have long, sticky filaments, trapped sediment floating in the sea water. The sediment reacted with calcite in the water to form limestone. This particular specimen was collected in Brown County, Kansas. It formed during the Carboniferous Era (360 to 298 MYA).

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Fossil Stromatolite from Kansas, Single Colony, Pennsylvanian Age US $15.00 Used in Collectibles, Rocks, Fossils & Minerals, Fossils

These tracks are found in rock from the Devonian Era, 414 to 390 million years old. They were formed by trilobites as they were walking or striding across muddy flats. When a trilobite is up to speed and really cruising along and striding quickly on the surface, the endopodites (feet) leave paired leg marks called Diplichnites.

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