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Porcupine Cr'k, Section of Lower Rosebud beds, below post office. About 150-200ft. variable Calcareous with hard layers stratified + fine shaly limestones Harder sandy bans, buff with concretionary #26-35, 42-48 nodules irregularly 37, 38 #70. scattered through 64,56, soft sandy beds, buff, 75 no concretions or a few arranged in layers #50 Gray shaly or solid sandstones #51 with calcareous layers #57, 58, 59, 60, 62, 63, 53, 54 Fine sandy clays weathering 36, 51, 52, 55, 66, 65, 67 more like White River, lighter buff, 68, 71-4 moderately hard 69. Section of Upper Rosebud Beds, above post office on Porcupine Cr'k. Abt 150 ft. Porcupine Butte Quartzite layer, gray #13 Fine buff clayey sandstone level of pocket nos 78-83 much like lowest member but sandier Miolabis limb & foot bones, same as 18, 20 &23. Not collected (W.D.M.) 102-103 Channel bed, irregular #12, 14-25 sands + mud conglomerate Calcareous, shaly limestone layers, probably about level of top of section of lower Rosebud beds.