Pisocrinus-Abyssocrinus antiquus Assoc., Henryhouse Fm., White Mound

"Echinoderms most often cups and calices...but a very small proportion of complete crowns also occur..root systems and holdfasts moderately common...skeletal grains generally unabraded, and there is only occasional evidence of winnowing. Trilobites highly fragmented, as are many of the common bryzoan taxa. Brachiopods usually intact. The abundant and diverse inadunate and flexible crinoid fauna, limited but diverse non-crinoid echinderms, and rare but diverse camerates, sugges a rather deep water assemblage occasionally disturbed by storms, i.e. well below normal wave base. Base on [brachiopods] a position analogous to BA outer 4 or inner 5 is likely. The brach. faunaa differs somewhat from that described by Amsden 91951) from more typical Henryhouse sections...This argillaceous carbonate community somewaht resembles the Midcontinent carbonates from which the Pisocrinus-Gissocrinus assoc. [PBDB coll. 26815, 26816] is derived, but echinoderm diversity is much less and brachiopods are correspondingly more prominent in the younger community." [This marl facies is between shallower limestone facies and deeper graptolite shale facies according to some of Amsden's maps.]\r\nSEP environmental call based on given info

White Mound, NW1/4 NE1/4 sec. 20 T2S R3E, Murray County, Oklahoma. Community known from Lawrence Uplift and Arbuckle Mts., Murray and Pontococ Counties.