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Offering this quite uncommon bluish purple fossil crinoid specimen in the matrix from Central Kentucky, Mississippian deposits.

The Mississippian is a subperiod in the geologic timescale or a subsystem of the geologic record. It is the earliest/lowermost of two subperiods of the Carboniferous period lasting from roughly 359 to 318 Ma (million years ago). As with most other geochronologic units, the rock beds that define the Mississippian are well identified, but the exact start and end dates are uncertain by a few million years. The Mississippian is so named because rocks with this age are exposed in the Mississippi River valley.

In North America, where the interval consists primarily of marine limestones, it was in the past treated as a full-fledged geologic period between the Devonian and the Pennsylvanian. In Europe, the Mississippian and Pennsylvanian are one more-or-less continuous sequence of lowland continental deposits and are grouped together as the Carboniferous system, and sometimes called the Upper Carboniferous and Lower Carboniferous instead. During the Mississippian subperiod an important phase of orogeny occurred in the Appalachian Mountains.

This specimen measures approximately 3 x 3 inches.

Please feel free to contact me anytime and thanks for looking!

Rare Blue Crinoid Specimen

$25.00

Only 1 available


Overview

  • Vintage handmade item from the 1970s
  • Materials: chert, flint, limestone
  • Ships worldwide from United States
  • Feedback: 104 reviews
  • Favorited by: 7 people