Irrespective of geologic age, Phanerozoic coated phosphate grains deposited beneath productive surface waters in organic-rich paleoenvironments are of only two types. Unconformity-bounded grains contain internal discordances ...

Measurements of compressional wave attenuation are presented for 30 low-porosity (φ = 0.4-8.8 per cent) oceanic basalts collected from 10 oceanic drill holes. The first laboratory measurements of shear wave attenuation in ...