leg site hole core section top interval depth (cm) bottom interval depth (cm) top of layer (m) bottom of layer(m) thickness of layer(m) lithology source heterogeneity hardness comp1 comp2 comp3 comp4 comp5 processing history flag lithology name from screen program lithology name from shipboard observer avg. calcareous material avg. siliceous material avg. detrital material age mnemonic at top of layer age mnemonic at bottom of layer age code(interpreted) avg density from g.r.a.p.e. avg porosity from g.r.a.p.e. number of g.r.a.p.e. measurements 20 195 B 3 1 75.0 150.0 389.75 390.50 0.75 CALCAREOUS PELAGIC MONOGENIC HARD NANNOFOSSIL CARBONATE Successful CARBONATE RICH INDURATED NANNOFOSSIL CHALK CHERT 98 0 2 HAUTERIVIAN VALANGINIAN NO AGE GIVEN