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So, the end of Cretaceous Periods about 65 million years ago, K-T Extinction on the 65 MYA, Ornithischia, Sauropodomorpha, Plesiosauria, Pterosauria, and Ammonoidea are being died out in 65 million years ago, but theropods are still alive such as Tyrannosaurus, and Ornithomimidae, Dromaeosauridae, and Troodontidae will turn into the Aves, but Deinosuchus are still alives, will be turn into the American Alligator, and Mosasaurus are still alive and willbe turn into the modern day marine lizards, and also mammals, reptiles, amphibians, fishes, arthropods are still alive in present day and theropods in present day including the birds. — Preceding unsigned comment added by ChrisTheWhaleKing (talk • contribs) 15:38, 28 May 2018 (UTC)[reply]

Paleogene?

The event is almost always called the Cretaceous–Tertiary extinction event. Geoffrey.landis (talk) 01:38, 4 October 2016 (UTC)[reply]

The early part of the Tertiary is now officially called the Paleogene. Older scientific texts did refer to "Cretaceous-Tertiary" but this would be regarded as obsolete/incorrect if it were to be used now. GeoWriter (talk) 12:19, 21 November 2016 (UTC)[reply]

Can we have a source for the fact that K-T would be incorrect, or obsolete? I heard a geology professor go on at great length about it just today. Thanks. BeenAroundAWhile (talk) 22:25, 11 December 2017 (UTC)[reply]

It is correct that ICS now discourages the use of the word Tertiary, but Cretaceous-Tertiary is not generally considered incorrect or obsolete. A search on Google Scholar for articles published in 2017 shows 1560 hits for "Cretaceous-Tertiary" and 1340 for "Cretaceous–Paleogene". The older term is thus still more popular even in scholarly sources. Dudley Miles (talk) 23:24, 11 December 2017 (UTC)[reply]

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Location of impact

A recent BBC TV programme argued that the location of the impact in an area rich in sulphur and gypsum was crucial, and if the impact had occurred a few minutes earlier or later it would have been in the deep ocean, and the effects would not have been catastrophic. The dinosaurs would have survived and humans would not have evolved. See [1]. Does anyone know of an RS on this? Dudley Miles (talk) 09:36, 18 July 2017 (UTC)[reply]

Size of the Impactor

See Talk:Chicxulub_impactor#Size_of_the_Impactor for a discussion.

Whatever you do, keep the two article in line with each other. 217.248.54.67 (talk) 10:26, 21 July 2017 (UTC)[reply]

I just updated the article Maastrichtian. All three articles should be kept in line with each other.Curious Eric 14:25, 15 March 2018 (UTC)[reply]

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Mammal info is dated

The section on mammals is badly dated. ' Diversification of mammals stalled across the boundary.[citation from 2007] Current research indicates that mammals did not explosively diversify across the K–Pg boundary, despite the environment niches made available by the extinction of dinosaurs.[citation from 2003].' This is no longer the consensus. Instead diversification rates increased to around 3 times pre-event levels: Halliday, Upchurch, and Goswamil, Proceedings Biological Science, 2016 Jun 29; 283(1833): 20153026. doi: 10.1098/rspb.2015.3026, "Eutherians experienced elevated evolutionary rates in the immediate aftermath of the Cretaceous–Palaeogene mass extinction". https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4936024/ . Other evidence corroborates. The idea that the CT event had little impact on mammal evolution rates is no longer viable.

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+== Mammal info is dated ==
+The section on mammals is badly dated. ' Diversification of mammals stalled across the boundary.[citation from 2007] Current research indicates that mammals did not explosively diversify across the K–Pg boundary, despite the environment niches made available by the extinction of dinosaurs.[citation from 2003].' This is no longer the consensus. Instead diversification rates increased to around 3 times pre-event levels: Halliday, Upchurch, and Goswamil, Proceedings Biological Science, 2016 Jun 29; 283(1833): 20153026. doi:  10.1098/rspb.2015.3026, "Eutherians experienced elevated evolutionary rates in the immediate aftermath of the Cretaceous–Palaeogene mass extinction". https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4936024/ . Other evidence corroborates. The idea that the CT event had little impact on mammal evolution rates is no longer viable.