(2001) described a similar situation in which the early west-vergent Graham Lake thrust is cut by the Sennebec Pond high-angle fault. In that area, however, it is the Sennebec Pond fault which separates equivalents of the Fredericton and St.
Mapping and seismic reflection studies indicate that recumbent folds, thrust faults, and high-angle faults are more abundant than was shown by Osberg et al.
Sleeper engineers have developed a blasting method to enhance drainage across high-angle fault
zones with well developed clay gouge, and to open up drainage pathways in the argillised rocks on the footwall side of the fault.
(1999), showing that most common brittle structures are NW-SE and NE-SW high-angle faults
with oblique slip.
Therefore, the premise of the methodology used in this study is that topographic features showing significant vertical offset on a GRAVIS can be interpreted as high-angle faults
. In this study of the middle Benue trough, Nigeria, the bandpass filtered gravity map was inverted to produce a topographic surface map of the basement.
When arcs are stretched they split, initially forming a rift (an elongate depression bounded by high-angle faults
) and eventually a back-arc spreading center.
Outside caldera margins, represented by normal and high-angle faults
, and near them there are several geothermal water springs and CO2 gas seeps.