Researchers have found a remarkable effect while studying how marine particles sink, which could affect the way scientists assess global carbon fluxes.
Ammonites are an group of marine animals of the subclass Ammonoidea in the class Cephalopoda. They are excellent index fossils, and it is often possible to link the rock layer in which they are found to specific geologic time periods.mmonites are an group of marine animals of the subclass Ammonoidea in the class Cephalopoda. They are excellent index fossils, and it is often possible to link the rock layer in which they are found to specific geologic time periods.
Magnetite. Magnetite is a natural magnet! Part of a mineral group called the oxides, magnetite can usually be identified by its strong magnetism and dark color. Magnetite is often not very abundant, but it can be found in many different types of igneous, metamorphic, and sedimentary rocks.