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Fossil examples of Cardiospermum are much more coriaceous that that of living species as evidenced by the heavy deposit of carbon and marked relief seen in the Eocene deposits
They include: Chilosia sp
chlorite and illite) are common and calcite abundance is greater than dolomite
The second oil-shale interval is located in the upper 10 m of the Parachute Creek Member
grainstone)
Eocene Green River Spider IF-M-PCM-16-083 Jurassic Fossil examples of Cardiospermum areUnidentified Spider aff. Miagrammopes Green River Formation Parachute Creek Member Middle Eocene Uintah County, Utah This is a very excellent fossil spider from the Parachute Creek beds in Utah. All eight legs are present. Leg spread is about 1 cm. Fossil spiders are very rare but this is a very fine specimen. A recent paper by Paul Selden (Arthropoda Selecta V23 2 pp 207 219) adds significant knowledge to fossil spiders from this formation. The upper
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