Long, a member of the Horlick Mountains Traverse party 1958-59, who, with Charles Bentley, Frederic Darling and Jack Long, climbed to the summit in December 1958. Glossopteris is a prehistoric fernlike plant whose imprint was found on rocks of this mountain. Museum Ledge is located on the southwest shoulder of Mount Glossopteris. Iversen Peak A peak 3 miles (4.8 km) east-northeast of Urbanak Peak at the northeast end of the range. Surveyed by the USARP Horlick Mountains Traverse party in December 1958. Named by US-ACAN for Frede Iversen, ionospheric physicist at Byrd Station in 1960. Mirsky Ledge A snow-covered ledge, or shelf-like feature, about NE of Mount Schopf. Urbanak Peak and Iversen Peak rise above the ledge which is the apparent northeast extremity of the Horlick Mountains. The geology of these mountains was investigated by researchers from the Institute of Polar Studies, Ohio State University, 1958-62. The ledge was named by US-ACAN for Arthur Mirsky, Assistant Director of the Institute in that period. Quartz Pebble Hill A flat-topped elevation on the north escarpment of Buckeye Table. The hill is located where Discovery Ridge joins the main escarpment. The rock that forms the hill is composed of sandstone and quartz pebble conglomerate. The name was suggested by William E. Long, geologist of the Ohio State University expedition, who worked in these mountains in 1960-61 and 1961-62. Mount Schopf – An elongated, mesa-like, mainly ice-covered mountain located just east of Buckeye Table. Surveyed by the USARP Horlick Mountains Traverse party in Dec. 1958. Named by US-ACAN for James M. Schopf, geologist, Coal and Geology Laboratory, U.S. Geological Survey (USGS), Columbus, Ohio, who greatly assisted the field geologist by analyzing coal and related rock specimens from this mountain. Schopf was a member of the Horlick Mountains Party in the 1961-62 season. Urbanak Peak A peak with exposed rock on the north side, situated along Mirsky Ledge. Surveyed by the USARP Horlick Mountains Traverse party in December 1958. Named by US-ACAN for Richard L. Urbanak, meteorologist at Byrd Station in 1960. See also Higgins Canyon Otago Spur Ricker Canyon Skinner Peak Terrace Ridge Treves Butte References Transantarctic Mountains Mountain ranges of Marie Byrd Land