甲· a8。嚣"● ●:∵ 88 B C D Determination of the top and bottom surfaces from graded bedding
Determination of the top and bottom surfaces from graded bedding
A C Determination of the top and bottom surfaces from cross-bedding
Determination of the top and bottom surfaces from cross-bedding
西 b 东 熔岩 砂岩 ° 砾岩 页岩 Determination of the top surfaces of the beds from the scour surfaces
Determination of the top surfaces of the beds from the scour surfaces
K featheredge J3 TE P J3 K K--Cretaceous P J— Jurassic T-Triassic P P— Permian ▲K 十+1 y—Gr granite Parallel unconformity, Angular Unconformity
Parallel unconformity, Angular Unconformity Feather edge K—Cretaceous J —Jurassic T—Triassic P— Permian — Granite
chaPTER 3 ATTITUDE OF PLANES AND LINES
CHAPTER 3 ATTITUDE OF PLANES AND LINES