Dating sediment cores dating service pueblo co
Since particular microbes live only under particular environmental conditions, scientists can use them to track changes in water temperature and chemistry over millions of years.
As with ice cores, ash, dust, and pollen found among the layers can tell of other environmental events and conditions taking place around the globe at that time.
Secular scientists have recognized the circularity in this argument and have attempted to guard against it by using “independent” checks on the orbital tuning method.
However, these checks are not truly independent, as they all assume the old-earth, evolutionary paradigm.
In the ocean, a continual rain of fine sediment collects on the sea floor, forming a thick layer of sediment up to 5.6 miles (9 km) thick.
Most of this sediment is made up of the miniscule shells of microscopic sea life.
First, the extreme scarcity of manganese nodules within all but the uppermost seafloor sediments (Glasby 1978) is a strong argument that the bulk of these sediments were deposited much too rapidly for the growth of nodules of any appreciable size (Patrick 2010).
At today’s slow sedimentation rates, it can take a thousand years for a few centimeters of sediment to be deposited on the ocean floor (Cronin 2010).