Not exact matches
But as you descend underground,
past Titania's Veil (a gleaming white
calcite formation), crossing Giant's Hall and skirting the mirror surface of Dream Lake, you will hear an ethereal music start to fill the dripping hush.
The specific forms of each coccolith most likely evolved under pressure from zooplankton, the microscopic animal group a notch up the food chain that developed mandibles, claws, and other accoutrements for getting
past the hard
calcite coccoliths.
Stalactites and Stalagmites hang high overhead as we float
past impressive
calcite crystals.
Past hypotheses arguing calcification was dependent on carbonate ion concentration, or aragonite and
calcite saturation levels, were most likely misled by the fact that higher carbonate ion concentrations are a daily «side effect» of photosynthesis.
Here we present the first reconstruction of rainfall variability for the western tropical Atlantic that spans the
past 8 centuries and is derived from the δ18O of speleothem
calcite.
The magnitude of sea - level estimates for the
past 100 million years rely heavily on foraminiferal
calcite oxygen isotopes (δ18O), which are influenced by temperature, evaporation and precipitation, and diagenesis2.