GEOLOGIC MAP OF THE HANSEN RANCH QUADRANGLE, ... Vertical -.
Horizontal. Strike and dip of joints. ·-·~ Inclined --+-- Vertical + Horizontal. Note:
planar ...
U.S. DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY
GEOLOGIC MAP OF THE HANSEN RANCH QUADRANGLE, BEAVERHEAD COUNTY, SOUTHWEST MONTANA By J.W. M'Gonigle, M.A. Kirschbaum, and J.N. Weaver
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> GEOLOGIC QUADRANGLE MAP
Published by the U.S. Geological Survey, 1991
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Contact - Dashed where approximately located; short dashed where inferred; dotted where concealed · Contact - Showing dip; well exposed at triangle
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Fault - Dashed where approximately located; short dashed where inferred; dotted where concealed Fault, showing dip - Ball and bar en downthrown side Normal fault - Hachured on downthrown side
Strike and dip Jr·beds - Ball indkates top of beds ~rlown from sedimentary struiCtul!s. ~ Inclined EB ~dr.izontal -+- Vertical ~ d>vhturned ~~ Strike and dip oif foliation ~ Inclined
-+-
Strike and dip
Vertical
Horizontal
d·f cleavage
~ Inclined ,_____ Vertical
+
Horizontal
Bearing and plunge of lineation
'5--
Inclined
•
Vertical -
Strike and dip of joints Fault - Showing relative horizontal movement
+
·-·~ Inclined --+-- Vertical
Horizontal
+ Horizontal
Note: planar symbols (strike and dip of beds, foliation or schistosity, and cleavage) may be co'mbined with linear symbols to record data observed at same locality by superimposed symbols at point of observation. Coexisting planar symbols are shown intersecting at point of observation.
Thrust faul.t - Sawteeth on upper plate
4111--+1--- .... Anticline - Showing direction ot plunge; dashed where approximately located; dotted where concealed
Asymmetric anticline - Short arrow indicates steeper limb
A
Overturned anticline - Showing direction of dip of limbs
- - 1 - - - ..... Syncline- Showmg direction of plunge;
Shafts f!l
>-;x
Asymmetric syncline - Short arrow indicates steeper limb
Minor anticline - Showing plunge of axis Minor syncline - Showing plunge of axis
Accessible >+- Inaccessible
Prospect
~
Abandoned
X
Abandoned
Drilling
9
Shut-in
~
Gas
•
Oil
~ Show of gas Show of oil
Overturnc::d syncline - Showing direction of dip of limbs Monocline - Showing direction of plunge of axis
Inclined
Quarry ~
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~
Adit, tunnel, or slope
...4.....
dashed where approximately located; dotted where concealed
