As discussed below, we largely achieved our goals at Site 1137. We cored basaltic basement and interbedded sediment from 219.5 to 371.2 mbsf. One of the most significant and unexpected results of the leg was the discovery of garnet gneiss clasts in a fluvial conglomerate interbedded with basaltic basement at this site. This provides unequivocal evidence of continental crust in Elan Bank. In addition, the geochemical characteristics of these basalts clearly indicate a continental crustal component.
Some intervals contain diatoms or foraminifers.
Natural gamma-ray intensities are relatively high in the glauconitic sand. All basement units are clearly distinguishable in downhole logging data. Relatively good core recovery and high quality logs enable us to constrain true thicknesses of the basement units through core-log integration. Velocities within lava flows correlate inversely with the degree of alteration estimated from visual inspection. We interpret each basaltic unit as a single lava flow.