The area I'm going to is called Big Brook. I've always wanted to go, but never made the time. Reading all of your rock talk got me going once I realized I already had the galvanized hardware cloth and scrap wood to make a sifting box.http://www.njfossils.net/cover.html
My understanding is that they are late cretaceous fossils.
Vulture Chow, have a GREAT time.
The Late Cretaceous was a happening time. Dinosaurs like Tyrannosaurus
ruled the land . The Cretaceous seas had hadrosaurs, large crabs, squid, a whole passel of species. Sometimes they got pretty big. There's one species of clam, Exogyra ponderosa
, which was a full three feet across. Saurians and orinthiscian dinosaurs have been found in the Hell Creek Formation in Montana, where Jack Horner and the rest of the crew at Montana State University and the Museum of the Rockies found Maiasaurus
eggs in clutches indicating that dinosaurs of that genera cared for their young.
Notable finds have also been made in the Late Cretaceous Coon Creek Formation of Tennessee (Yale's Peabody Museum of Natural History got a huge collection of specimens), the McNairy Formation (same state, but also in Missouri where hadrosaur parts have been found at the Chronister site near Marble Hill in Bollinger County, and many other localities.
In Missouri near Sikeston in the Porter's Creek Clay are remnants of what ended it all, but the first evidence was found by geologist Walter Alvarez at U Cal Berkeleyin a place called Gubbio, Italy. There, at the Cretacous-Tertiary boundary layer he found a sudden increase in the amount of iridium present in the clay. His postulate changed our understanding of extinction and the rare events that may cause it. There could only be two possible explanations for an iridium spike that large, one being volcanism. Indeed, in India, the Deccan Plateau was being built by the addition of great floods of basalt. It was the other explanation that now has become generally accepted for the extinction of the dinosaurs, A MASSIVE strike by an extraterrestrial object, either a meteorite or cometary body. The crater of that strike is called Chixculub, and is just offshore of the Yucatan Penninsula in Mexico. The iridium layer has been found worldwide in many other locations where the so-called Cretaceous-Tertiary, or K-T boundary is known to occur.
So, you have sharks, giant clams, meteorites, flood basalts, and extinction. A very happening time. I wish I could be with you to show you the wonder of it all. ENJOY!
And THANK YOU for the link!