FIGURE 2.3 The Adirondack Dome (Courtesy Land Care, Inc., Boonville, New York). Plate interiors often contain isolated geologic structures that are difficult to relate to ancient plate boundaries. The Michigan Basin is another classic example.

TABLE 2.1 Vertical Deformation Associated with U.S. Intraplate Earthquakes

Earthquake

Magnitude

Coseismic

Postseismic

References

Amplitude

Extent, km

Amplitude

Extent, km

Hebgen Lake, Montana (1959)

7.5

6 m (15 cm)

20×50 (80×140)

30 cm (7 cm)a

100 (40)a

Myers and Hamilton, 1964

Savage and Hastie, 1966

Reilinger et al., 1977

Reilinger, 1985

Savage et al., 1985

Borah Peak, Idaho (1983)

7.3

1.5 m

50

 

 

Stein and Barrientos, 1985

Dixie Valley, Nevada (1954)

7.1

1.5 m (1–2 m)a

10

7.5 cm

8

Savage and Hastie, 1966

Savage and Church, 1974

Valentine, Texas (1931)

6.4

10 cm

 

 

50

Ni et al., 1981

Yellowstone Park, Wyoming (1975)

6

10 cm

 

 

 

Pitt et al., 1979

Oroville, California (1975)

5.7

10 cm

15

 

 

Savage et al., 1977

aHorizontal movement, 1971–1984.



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