Geology Reference
In-Depth Information
Figure 2.13.
Gneiss domes in (a) Zimbabwe (top left), (b) French Guyana (top right) and (c) Quebec, Canada
(bottom). McGregor, 1951; Choubert, 1974; and air photographs of the Mingan-Natashquan
area, Québec, Canada (Department of Energy, Mines and Resources, Ottawa).
Lamego (1938) clearly envisaged a similar situation obtaining in the Rio de Janeiro region, and
Gilbert (1904), the author of the pressure release hypothesis, is quoted by Dale (1923) as suggest-
ing that Stone Mountain in Georgia was due to compressive strains. Several other geologists who
examined granitic domes in the northeastern United States deduced that the granites involved are
