Ancient Seas, Mississippian to Triassic period, ca. 359.2 to 200 million years ago. A collection of 11 fossils of ancient sea creatures, plants, and minerals which includes: 4 brachiopods, 4 blastoids, a fern, and a desert rose mineral. Three of the blastoids are mounted on a slate matrix and the fern is enclosed in an orange sandstone matrix, while the rest of the fossils are fully excavated and three dimensional. The desert rose is an orange-russet formation of gypsum, which often looks like a cluster of petals or a rose, but it is fully a rock and sand formation and not organic. The blastoids were a type of stemmed sea dwelling echinoderms that had petaloid heads with grooves radiating from the mouth that trapped food. The fern is a partial frond that perhaps comes from the Pecopteris genus of tree ferns. The individual ridges of many of the brachiopod shells are largely intact - these are a type of clam with two shells or valves. Size (largest matrix): 2.25" L x 2" W (5.7 cm x 5.1 cm); (blastoid fossil): 0.3" diameter (0.8 cm)
Provenance: ex-estate of Eldert Bontekoe, Pegasi Numismatics, Ann Arbor, Michigan, USA acquired before 2000
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#158632
Condition
The blastoids are reattached and positioned on the slate matrix and coated in a clear fixative. The largest matrix is repaired from 3 pieces with visible break lines. Losses to fern fossil. Chips and nicks to other fossils. Desert rose formation is worn and the individual ridges are not very discernable. All are professionally prepared and excavated, with nice details on the blastoids and fern.