A good take on cosmic impacts and any kind of catastrophe can be found by going to https://cometstorm.wordpress.com/a-different-kind-of-climate-catastrophe/ … Dennis Cox is an ex military man who expanded on his experience of the effects of bomb blasts to research into cosmic air blasts and has extensively used Google Earth to seek out geological oddities – and then got out his walking boots to go and investigate the anomalies on the ground. One of these oddities is the occurrence of ignimbrites. These are according to mainstream views the result of lava outflows – or volcanism. Cox thinks some ignimbrites can be formed airburst phenomena – meteors exploding in the atmosphere and therefore not leaving a crater behind to tell the tale. Some of his ignimbrite fields would have required big meteors – or lots of fire pouring out of the sky.
Dennis Cox is actively seeking evidence of such an event coinciding with the Younger Dryas boundary (Kloosterman's Alleroed boundary event). However, he is an amateur and appears to work out things by himself – which means that although he is innovative some of his ideas will immediately be rejected by the professionals. He pops up now and again at George Howard's web site http://cosmictusk.com (in the comments).
The article begins by informing the readers that Gottfried Leibnitz is the real villain of the piece as far as Uniformitarianism is concerned. Leibnitz lived in the early 18th century and was a proficient mathematician but not up to scratch as a geologist. He believed, and he taught, that the God of the Universe had created planet Earth and all its flora and fauna solely for the benefit of humanity – God's favourite mammal. His ideas went on to almost dominate the small circle of educated rich people of the time and in the process almost completely eliminated episodic catastrophism from the intellectual elite. When Hutton and Lyell came along most academics were already in the right frame of mind – which is just as well as they are both overrated, he suggests, and not exactly brilliant geologists. This of course contrary to what you might read in a geological textbook where heroes are jealously guarded from criticism – but reading between the lines of the same textbooks Cox is probably quite right to be disrespectful. The whole point is that big institutions, the elite who like to be on top of everything, and in control, as well as your emerging class of social engineers, quite simply liked the idea of a stable world (with no interruptions from space). All the Church had in their arsenal was the Flood – a fairly easy and isolated target to blow out of the water (which was duly accomplished with great fanfare).
Cox continues in irreverent vein for some 50 pages and therefore the link above is to be enjoyed in small doses – so expect the odd post on this in the future.