Biostratigraphy does not directly provide an absolute age determination of a rock, but merely places it within an interval of time at which that fossil assemblage is known to have coexisted.
Both disciplines work together hand in hand however, to the point where they share the same system of naming rock layers and the time spans utilized to classify layers within a stratum.
The age of the fossil must be determined so it can be compared to other fossil species from the same time period.
Understanding the ages of related fossil species helps scientists piece together the evolutionary history of a group of organisms.
By measuring the amount of radioactive decay of a radioactive isotope with a known half-life, geologists can establish the absolute age of the parent material.
There are three major types of rock: igneous, sedimentary, and metamorphic.
The rock cycle is an important concept in geology which illustrates the relationships between these three types of rock, and magma.
) is an earth science concerned with the solid Earth, the rocks of which it is composed, and the processes by which they change over time.
Geology can also refer generally to the study of the solid features of any terrestrial planet (such as the geology of the Moon or Mars).
PERIADRIATIC MARGIN The South Adriatic-Ionian Zone is built up of Cretaceous shallow marine limestones and anhydrites, also accompanied by dolomites in the upper parts; next, of transgressive Middle Eocene limestone and Eocene-Oligocene flysch.