This is the metadata section. Skip to content viewer section. The burial efficiency of biogenic silica (BSi) in deltaic sediments is associated both with the nutrient balance in estuarine ecosystems ...

Replacement by silica (silicification) also requires acidic conditions ... (a nodule of well-cemented sediment in the middle of a relatively uncemented sedimentary rock). Indeed, the critter probably ...

There are three types of rock: igneous, metamorphic, and sedimentary. Thundereggs form ... The composition of the magma, including the amount of silica and the presence of various gases, also ...