... were identified in 31 samples collected during an oceanographic cruise (“Bocche 2003” – P.I.C Interreg III Project) that provided new geomorphologic and sedimentologic data on the western continental shelf of the strait. Biotic parameters (species diversity, density, Fisher α index, Shannon-Weaver...

... crystallinity index (CI) decreases with increasing R 0 : log (CI) = 1.01 - 0.07 (R 0 ). Plots of bitumen ratio (bitumen/total organic carbon) vs. vitrinite reflectance, Weaver’s illite sharpness ratio, and Kubler’s crystallinity index all reveal hydrocarbon generation-preservation curves that define submature...

..., San Pietro Mussolino, Vestenanova, and the Bolca area (Vicenza; Verona – NE Italy). The high value of the Shannon-Weaver biodiversity index calculated for these buildups confirms the hypothesis of the existence during the Early Eocene of a large lagoon characterized by shallow water and patch reefs...

... is that they are allophane or some other clay mineral with a very low index. (2) The “turbid” objects appear brownish in transmitted light and milky in reflected light, exactly like the liquid-filled vacuoles in granitic quartz or in chalcedonic quartz (Folk and Weaver, 1952). This is probably due to some complex dispersion...

... are influenced by the degree of thermal maturity. Weaver’s sharpness ratio for illite and Kubler’s crystallinity index are both significantly related to mean vitrinite reflectance. The log of the sharpness ratio increases while the log of the crystallinity index decreases with increasing mean vitrinite...

... sequence is based largely on assemblages from the Temblor Formation; the basal shale member contains Bruclarkia columbiana, an index species for the “Lincoln Stage” of Weaver. The overlying “Phacoides reef,” formerly assigned to the “Vaqueros Stage,” represents a previously unrecognized post-“Lincoln,” pre...

...., a sample taken 1 km south of the exposure of the Cathedral Escarpment on Fossil Ridge is likely to be a true distance of less than a few hundred metres normal to the paleo-cliff face). At higher grade, as the 10 Å peak becomes sharper, the error in measurement of the Weaver index becomes greater...