Core 14220 and the lateral continuity of soils at Apollo 14 Station G

Three soil samples at Apollo 14 Station G could potentially be used for stratigraphic correlation. Recently dissected core 14220, and core 14230 are 4 m apart and form the east leg of a triangle with an apex 7m to the west that contains trench samples 14145, 14156 and 14149, from top to bottom. Core 14220 penetrated approximately as deeply as the trench and showed a similar lithologic succession. At the base of both sections is a basalt-rich soil, overlain by a series of units that contain distinctive clasts of light soil and pebble-sized glass fragments. Fine-grained dark soil rich in vesicular glass is at the surface in both sections. The succession of similar soil types suggests that the trench correlates with 14220; but poor sample recovery makes thickness comparisons uncertain. Core 14230 appears to closely correlate with the middle of core 14220. The second layer from the top of 14220 and the top of 14230 are fine-grained with an unusually high percentage of light-matrix breccia, and the next stratum down in both cores is coarser and rich in light annealed-matrix breccia. The principal lithologic types that do not match, successionally, from core to core, are zones rich in vesicular glass and soil breccia. Such rock types are of regolith origin and probably represent patchy and discontinuous deposits.