(RLC-15) Geologic map of the Alphonsus GA region of the moon

This map is one of a series prepared from photographs transmitted by Ranger IX (Jet Propulsion Lab, 1966, pls A56-58, B70-82). It depicts the geology of some 724 sq km in the northeast part of the floor of Alphonsus (Diameter about 115 km), a typical flat-floored old terra crater or basin with a subdued rim. Similar basins abound in the south central terrae of the visable hemisphere and on the far side of the Moon. Alphonsus is of particular interest, however, because of a well developed interior rille system and associated dark-halo craters.

本地图为系列制图成果之一，其制作基于徘徊者9号（Ranger IX，喷气推进实验室，1966年，图版A56-58、B70-82）传回的摄影影像。该地图覆盖阿尔冯斯陨石坑（Alphonsus）坑底东北部约724平方公里的区域，展示其地质情况。阿尔冯斯陨石坑直径约115公里，属于典型的平底古老月陆（terra）陨石坑或盆地，边缘较为平缓。这类平缓盆地在月球可见半球的中南部月陆（terrae）区以及月球背面广泛分布。不过，阿尔冯斯陨石坑因其发育完好的内部月面沟系（rille system）与伴生暗晕陨石坑，而备受学界关注。