Siliceous sponge spicules are present and often diverse in sediments drilled by Ocean Drilling Program Leg 120. The sponge spicule assemblages are tabulated for Holes 748A and 748B. Neogene assemblages consist mostly of monaxons, whereas chelae, amphidiscs, discorhabds, polyaxons, and other spicule morphologies are often abundant in middle Eocene to upper Oligocene sediments.

Supplement to: Ahlbach, W John; McCartney, Kevin (1992): Siliceous sponge spicules from Site 748. In: Wise, SW; Schlich, R; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 120, 833-837