File:104-Figure 6.jpg

Figure 6 -- Diagram shows boundaries and classification of formal units (groups, formations, members) and tongues and informal facies within two intertonguing groups consisting predominantly of diamicton and sorted sediment. Formation A is a lithostratigraphic unit of a sorted-sediment group that interfingers with formations X,Y, and Z, diamicton units of a seperate group. Formation A contains A1, a tongue of formation A that extends beneath formation X, and informal facies Ax, Ay, Az, sorted-sediment units interpreted to relation to formations X, Y and Z, respectively. Where two or more tongues of the same facies occur in stratigraphic sequence, numerals in parentheses are added to designate the different tongues, for example Ay(1) and Ay(2). Formation X is partially subdivided; two members, X1 and X2, and one informal unit, facies Xa, are recognized. Formation Y is not subdivided into members, but two sorted-sediment facies, Ya and Yb, are recognized. Formation Z is subdivided into members Z1 and Z2.