Shrock, Robert Sequence in layered rocks : A study of features and structures useful determining top and bottom or order of succession in bedded an tabular rock bodies - New York : McGraw-Hill book company, 1948 - 507 p: : ill., graph., tab. bibliogr. p. 450-483 Subjects--Topical Terms: SédimentologieStratigraphieRoche sédimentairePyroclastiqueRoche métamorphique