Sadly, the only evidence we have for the inferiority of victims of extinction is the fact of their extinctiona circular argumentThe disturbing reality is that for none of the thousands of well-documented extinctions in the geologic past do we have a solid explanations of why extinction occurred. An average extinction rate between 2 and 4.6 fammilies per million years was reported by Raup and Sepkowski in 1982. Hence, species must constantly improve to avoid extinction Major Mass Extinctions 1. Coincident with the extinctions of marine microfossils, which have a relatively continuous record in the oceans. This layer has now been found worldwide, in marine and terrestrial rocks.
Ferns are the first species to colonize areas that have been devastated by natural disasters.
The fern spike is quickly dissipated as other species appear. In the latest Cretaceous, most of India is a mass of volcanic activity, the Deccan traps. Volcanism and impact could be related. Examining plant extinctions at the boundary, most of the plants that go extinct are temperate-adapted, with mechanisms to survive during the winter. Tropical plants, those most susceptible to extinction because they do not have mechanisms for seed dormancy, are not effected much at all.