THE ORIGIN AND SIGNIFICANCE OF THE INTERNAL SEDIMENTARY STRUCTURES OF TURBIDITES

Summary The hydrodynamic conditions controlling deposition from turbidity currents are examined and reasons are suggested for the formation or absence of each of Bouma’s five intervals (1962, p. 49). The factors which affect the grain distribution within turbidity currents are discussed and four different types of current are suggested. The nature of the graded division depends upon the type of current from which it formed, but the nature of …