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Legend (Inventory_Geology/Digital_Geologic-GIS_Map_of_the_Osage_SW_Quadrangle_Arkansas)

OSGS - Geologic Cross Section Lines (0)
geologic cross section line geologic cross section line
OSGS - Geologic Attitude Observation Localities (1)
strike and dip of inclined beds strike and dip of inclined beds
horizontal beds horizontal beds
fault dip amount, dip direction indicated fault dip amount, dip direction indicated
OSGS - Structure Contour Lines, Base of Middle Bloyd Sandstone, Bloyd Formation (PNbm) (2)
structure contour line, known or certain structure contour line, known or certain
OSGS - Structure Contour Lines, Top of Boone Formation (Mbmb) (3)
structure contour line, known or certain structure contour line, known or certain
OSGS - Map Symbology (4)
fault down-side (bar and ball) indicator fault down-side (bar and ball) indicator
monocline symbol monocline symbol
syncline symbol syncline symbol
OSGS - Folds (5)
syncline, approximate syncline, approximate
syncline, concealed syncline, concealed
monocline, approximate monocline, approximate
monocline, concealed monocline, concealed
OSGS - Faults (6)
normal fault, known or certain normal fault, known or certain
normal fault, approximate normal fault, approximate
normal fault, concealed normal fault, concealed
OSGS - Geologic Contacts (7)
known or certain known or certain
approximate approximate
inferred inferred
quadrangle boundary quadrangle boundary
water or shoreline water or shoreline
OSGS - Geologic Units (8)
water water
Qty - Young terrace and active channel deposits (Quaternary) Qty - Young terrace and active channel deposits (Quaternary)
Qc - Colluvial deposits (Quaternary) Qc - Colluvial deposits (Quaternary)
Qto2 - Very old terrace and alluvial deposits (Quaternary) Qto2 - Very old terrace and alluvial deposits (Quaternary)
PNa - Atoka Formation (Middle Pennsylvanian) PNa - Atoka Formation (Middle Pennsylvanian)
PNbu - Bloyd Formation, upper part (Lower Pennsylvanian) PNbu - Bloyd Formation, upper part (Lower Pennsylvanian)
PNbl - Bloyd Formation, lower part (Lower Pennsylvanian) PNbl - Bloyd Formation, lower part (Lower Pennsylvanian)
PNhp - Hale Formation, Prairie Grove Member (Lower Pennsylvanian) PNhp - Hale Formation, Prairie Grove Member (Lower Pennsylvanian)
PNhc - Hale Formation, Cane Hill Member (Lower Pennsylvanian) PNhc - Hale Formation, Cane Hill Member (Lower Pennsylvanian)
Mp - Pitkin Limestone (Upper Mississippian) Mp - Pitkin Limestone (Upper Mississippian)
Mf - Fayetteville Shale, undivided (Upper Mississippian) Mf - Fayetteville Shale, undivided (Upper Mississippian)
Mbv - Batesville Sandstone/Formation (Upper Mississippian) Mbv - Batesville Sandstone/Formation (Upper Mississippian)
Mbmb - Boone Formation, main body (Lower to Upper Mississippian) Mbmb - Boone Formation, main body (Lower to Upper Mississippian)
Mbsj - Boone Formation, St. Joe Limestone Member (Lower Mississippian) Mbsj - Boone Formation, St. Joe Limestone Member (Lower Mississippian)
Of - Fernvale Limestone (Upper Ordovician) Of - Fernvale Limestone (Upper Ordovician)
Oeu - Everton Formation, upper part (Middle Ordovician) Oeu - Everton Formation, upper part (Middle Ordovician)