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Mayfly fossils found in Crato Formation


Several years ago my daughter and I took a minivacation to Kelleys Island, home of the famous Glacial Grooves.  While we were there the island experienced an explosion of mayflies – they were everywhere.  A recent report from a famous fossil site in Brazil indicates they’ve been doing that for a long time.
The mayfly fossils were found in the Crato Formation, which formed in large lakes in what is now northeastern Brazil during the Cretaceous Period, the last period of the non-avian dinosaurs.  The lakes may have been 30 miles wide and 60 miles long.
The Crato Formation is an example of what is known as a lagerstatte, a site that has a lot of fossils or fossils that are preserved exceptionally well, sometimes (but rarely) both.  Another lagerstatte you might have heard of is the Burgess Shale, a 500-million-year-old Middle Cambrian site in the Canadian Rockies of British Columbia.  Another is the 150-million-year-old Solnhofen Limestone of the Jurassic Period from ....

Dale Gnidovec , Kelleys Island , Crato Formation , Cretaceous Period , Burgess Shale , Middle Cambrian , Canadian Rockies , Solnhofen Limestone , Jurassic Period , கெலிலேய்ச் தீவு , கிரடோ உருவாக்கம் , கிரேதாஸோஸ் காலம் , பர்கஸ் ஷேல் , நடுத்தர கேம்ப்ரியன் , கனடியன் பாறைகள் , ஜுராசிக் காலம் ,

GSA Today - Zealandia: Earth's Hidden Continent


GSA Today
Zealandia: Earth’s Hidden Continent
Cover Image
2 GNS Science, P.O. Box 30368, Lower Hutt 5040, New Zealand
3 SGEES, Victoria University of Wellington, P.O. Box 600, Wellington 6140, New Zealand
4 Service Géologique de Nouvelle Calédonie, B.P. 465, Nouméa 98845, New Caledonia
5 School of Geosciences, University of Sydney, NSW 2006, Australia
Abstract
A 4.9 Mkm
2 region of the southwest Pacific Ocean is made up of continental crust. The region has elevated bathymetry relative to surrounding oceanic crust, diverse and silica-rich rocks, and relatively thick and low-velocity crustal structure. Its isolation from Australia and large area support its definition as a continent Zealandia. Zealandia was formerly part of Gondwana. Today it is 94% submerged, mainly as a result of widespread Late Cretaceous crustal thinning preceding supercontinent breakup and consequent isostatic balance. The identification of Zealandia as a geological cont ....

Auckland Islands , New Zealand General , New Zealand , New Caledonia Trough , New Caledonia General , New Caledonia , Red Sea , Djibouti General , United States , Al Iskandariyah , Jan Mayen , Noord Holland , Lord Howe Island , New South Wales , Three Kings , Indian Ocean , United Kingdom , Bounty Islands , Campbell Island , Mount Cook , Chatham Islands , Norfolk Ridge , City Of , Australian Capital Territory , Victoria Basin , Kermadec Islands ,