1
Near Chicxulub there are ________ abnormal fields; in this place there is also a lot of shocked quartz .
2
Organisms that are part of the marine plankton. The fossils of these microorganisms underwent a great change 65 million years ago.
3
In Hell Creeck scientists have found fossils from ______ up to the KT limit. But after this limit there are no more fossils.
4
The explosion of a supernova can generate large amounts of iridium and another isotope called ______ 244. Its not found in the KT limit.
5
In Texas, scientists have found large rocks in a single place that originate from ________ places
6
When the rock vaporizes and then cools falling back into the earth it forms small glassy pearls called..
7
The last part of the Mesozoic where the dinosaurs became extinct.
8
Rocks subjected to high pressures as in the case of nuclear explosions form the so-called ________quartz.
9
The KT limit has 30 times more _____ than the average of the earth's crust.
10
After the KT limit there is a large number of spores of ____
Crear