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The second oil-shale interval is located in the upper 10 m of the Parachute Creek Member
and Heartseed Vine
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
This is a good example of the herbaceous vine Cardiospermum
Detrital clay minerals (smectite
Eocene Green River Spider IF-M-PCM-16-083 Jurassic The second oil-shale interval isUnidentified 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
