Geoscience Reference
In-Depth Information
Figure 10.39.
Locations
of some geographic,
geological and
geophysical features in
North America.
Newfoundland
Williston
Basin
Wind River
Uplift
Kanakee Arch
Illinois Basin
Rio
Grande
Rift
Figure 10.40.
Depth to
the Precambrian
basement beneath the
Williston Basin. The
contour interval is 500 m.
Triangles denote locations
of the centre of the basin
determined from the
best-fitting flexural model
of the plate during the
following time intervals:
1, 450-352 Ma; 2,
352-328 Ma; 3,
328-324 Ma; 4,
324-239 Ma; 5, 328-239
Ma; 6, 239-168 Ma; 7,
168-0 Ma; and 8,
114-0 Ma. (From Ahern
and Ditmars (1985).)
