These rocks dip to the west within the north-trending Dark Star Corridor, which is bounded to the east by a large displacement, normal fault
The Tilo prospect was defined as a structural trap with three-way dip closure on the down-thrown side of a normal fault
-- targeting the two principal productive reservoirs of the Llanos 34 Block: Guadalupe (main target) and Mirador (secondary target) sandstones.
This defined the geometry of a large tilted fault block closed by a major normal fault
This depressed zone lies between the bounding normal fault
and rim zone, an uplifted area that surrounds the inner crater.
Officials of the institute, however, ruled out the possibility that these crust movements suggest a new rise of magma near Miyakejima, citing a lack of normal fault
movements indicating rising magma in the area.
In 1996, both British and US expeditions to the slow-spreading Mid-Atlantic Ridge found remarkable seafloor edifices, each of which appears to have originated by long-lived slip on an individual normal fault
The contrasting situation is a normal fault
earthquake, during which rock on one side of the fault gets pulled away from and down relative to the rock on the other side, like a block sliding down a ramp.
Cerro Amarillo, a domal feature approximately six kilometers across, and Cerro Bola, which is truncated by a major north-south trending normal fault
, rise above this surface.
Each block has rotated along the curved plane of a listric normal fault
, so that the dip of the displaced strata is away from the valley axis.
Our recent geological work shows the northwest oriented Venturina and other veins are terminated by a low angle east-west normal fault
A steeper normal fault
trends east-southeast from Indian Beach, where it juxtaposes the Southwest Head Member basalt to the south against Seven Days Work and Ashburton Head members to the north (Fig.
Recent mapping has also identified a large normal fault
that cuts across the Bonza-Las Penas-FDN structure and has dropped the FDN target area approximately 250m relative to the Bonza-Las Penas epithermal system.