ZOE, Zoa Gera, Holocene discussed on TED Radio Hour


For the most part so the coastline would be a little bit to the west of there and so the dinosaurs that we find in new jersey are what we call the boat and float dinosaurs so these are dinosaurs that died on the beach ended up in the water probably initially sank when they get along full of water and then the body starts to decay and as those decay gases build up in the body the carcass floats they become like this big giant bobbing meet buoy at sea and as the body decays then pieces of the skeleton start to drop out of the carcass and settled to the seafloor and that's what we find in the cretaceous deposits of new jersey and those cretaceous deposits mark a geological era in eras are how geologists measure time and they usually created by these big world changing events and so in the dinosaurs go extinct and seventy five percent of life goes extinct after meteor hits the planet that's an era boundary that's when we changed from the meszaros to the senate zoe so think of an era catholic an hour on the clock right it's a lot of time tens of millions of years and like an hour it's made up of smaller increments but instead of minutes and seconds they're known as periods and epochs in our case we are in the senate zoellick era which started at the end of the time of the dinosaurs we are in the quaternary period which is within the senate zoa gera and within the quaternary we are in the holocene epoch the holocene epoch basically defined by the development of our human civilization but in geological time the holocene is tiny only the last eleven thousand seven hundred years or basically since the end of the last ice age it's roughly correlated with that the technical definition the holocene has to do with the extinction of a snail species in sicily right.

Coming up next