FIGURE 5.3(b) Identical outcrop width produced by different comblnations of dip
ID: 120765 • Letter: F
Question
FIGURE 5.3(b) Identical outcrop width produced by different comblnations of dip and bed thickness. Geologic Map Information The first capitalized letter of a geologic map symbol stands for the geologic system (Table 5.1). The second portion of the symbol usually designates the name of a spe- cific mapped unit (such as a group or formation) and is shown in lowercase letters. For example, the Stark Formation of the Mississippian system would be symbolized as Ms. Occasionally a formation will span parts of two systems. For example, the Ellenberger limestone is of Upper Cambrian-Lower Ordovician age. On a geologic map, it would be designated O-e. Since the Tertiary is subdivided into epochs, the symbols commonly begin with a "T" for the Tertiary period; the epoch is put into low- ercase letters along with the formation name. Complete the map symbols for the following geologic formations: Symbol Formation name Fort Wayne Winchell Conasauga Big Horn System/Epoch Mississippian Pennsylvanian Cambrian Ordovician Cretaceous Precambrian Vishnu Schist Red Mountain Town Mountain Claiborne Yorktown Triassic Precambrian Tertiary/Eocene Tertiary/PlioceneExplanation / Answer
The symbols from top to bottom are:
Mississippian: Mfw
Pennsylvanian: Pw
Cambrian: Cc
Ordovician: Obh
Cretaceous: Ca
Precambrian: Pvs
Silurian: Srm
Triassic: Tc
Precambrian : Ptm
Tertiary/Eocene: TEc
Tertiary/Pliocene: TPy
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