Environmental Engineering Reference
In-Depth Information
FIGURE 6.39
Dike in solid, tightly jointed granite,
displaced by small fault (Cabo Frio, Rio de
Janeiro, Brazil).
FIGURE 6.40
Cubic blocks formed by jointing in granite. Frost wedging has increased intensity (Mt. Desert Island, Maine).
a definite system (orthogonal, rhombic, etc.). In granite and similar massive formations,
joints often form cubic blocks as shown in Figure 6.40.
Columnar Jointing
Rapid cooling of magma in dikes, sills, and flows results in columnar jointing as shown in
