Great Drain; West Branch; Clearing to South of Fork. Great Drain; West Branch; Clearing to South of Fork; Layer I. Great Drain; West Branch; Clearing to South of Fork; Layer II. Great Drain; West Branch; ... Ζ-15 2805, 2806 Ζ 1435 P 12221 Ζ 1436 P 12222 Ζ 1437 P 12223 Ζ 1438 P 12224 Ζ 1439 P 12225 Ζ 1440 P 12226 Ζ 1434 A 833 Lot Ζ 638 Lot Ζ 639 Lot Ζ 640 Lot Ζ 641 Lot Ζ 642 Lot Ζ 643 Lot Ζ 644 Lot Ζ 645 Lot ... 3rd A.D ... 3rd A.D ... 3rd - 4th A.D ... 2nd - 3rd A.D.