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TY - JOUR AU - Plescia, J. B. PY - 1987 DA - 1987/05/01 TI - Geological terrains and crater frequencies on Ariel JO - Nature SP - 201 EP - 204 VL - 327 IS - 6119 AB - The southern hemisphere of Ariel, a satellite of Uranus, can be divided into several terrain types. Data on the size-frequency distribution of craters for those different terrain types indicate that these terrains formed over a relatively short period of time. Much information on Ariel's geological history can be gained from these data. SN - 1476-4687 UR - https://doi.org/10.1038/327201a0 DO - 10.1038/327201a0 ID - Plescia1987 ER -