Table 2.

List of sills with finger, step and bridge features seismically detected in the Wichianburi Sub-basin

Sill numberAreaSill sheetMagma flow directionOrientation of fingers and steps
GF34, 35, 38, 41NEStep and broken bridgeNNE–SSW and E–WNNE–SSW, ESE–WNW, E–W
GF38NEBridgeNW–SENW–SE
GF1Central basinFingerN–SN–S

These features are present in the sub-ophitic gabbro igneous group F (16 Ma). Magma flow direction is inferred from the trend of fingers and steps.