Figure 4. Diagram showing relations among stratigraphic units and timing of surface-faulting earthquakes at the Maislap site. Triangles show 14C-dated charcoal samples as in Figure 3; 14C ages are calibrated and expressed as time intervals in cal yr AD (approximate calendar years A.D.) at two standard deviations and rounded to the nearest 10 years. Large numbers correspond with groups of stream-channel deposits (groups 1, 2, and 3) displaced during faulting events A, B, and C, respectively. The dashed lines bounding the horizontal bars for events B, C, and D are intended to show that evidence of these faulting events may be present in the exposures reached by the dashed lines, but that the specific faulting event that produced the evidence could not be associated with a particular event. Erosional unconformities bounding some deposits are inferred from truncated bedding and soil horizons.