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The bluffs in the sunset at Fossil Beach in Kodiak, Alaska. Taken December 31, 2009. [copyright protected - ©2010 ~LKBphoto]
L’origine des pierres fossilisées
Célèbre pour ses fossiles de l'ère Primaire, la pierre de RISSANI, n'est intéressante qu'après polissage.
Elle est extraite dans le Sahara marocain près de la localité de RISSANI (d'où elle tire son nom).
C'est une roche marbrière pétrie de fossiles, principalement de céphalopodes, qui n'apparaissent que si la pierre est polie.
Dans le cas contraire le fossile se confond avec la pierre.
La roche est très dure, elle possède un coefficient de capillarité nul.
L'âge de ses fossiles est daté du Dévonien supérieur (environ 360 millions d'années).
La majorité de la faune est composée par des Goniatites, Orthocéras et Ammonites des Coraux et quelques trilobites.
Des oxydes de fer et de carbonates confèrent la couleur noire à la roche.
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Buff-colored outcrops of the fossil-bearing Las Vegas Formation (center of photo) near Tule Springs in the upper Las Vegas Wash. Snow-capped mountains of the Spring Range west of Las Vegas are in the background. View is to the southwest. San Bernardino County Museum photo.
Fossil tree, species Sigillaria, from the Carboniferous period. About 320 million years old. Found in a quarry near Stanhope, County Durham, in 1913 and brought to Stanhope churchyard.
Nick and I on a day trip to Calvert Cliffs state park in Maryland - home to a shoreline full of fossils.
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Description des animaux sans vertèbres découverts dans le bassin de Paris pour servir de supplément à la Description des coquilles fossiles des environs de Paris comprenant une revue générale de toute t.1
New York, Baillière Brothers, 1860-66.
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Supposedly a very simple creature. What makes it simple? When examined carefully it is rather complex. What makes it very old? Just because it looks old.
Great little nugget just full of tiny fossils in every direction. Yet another rock from a load of gravel given to me by my good friends Jay and Keith. Thanks. April 2015
There are plenty of fossils around, some are easy to find, some are not.
There are shells, shark teeth etc scattered around from the days when it was the ocean floor.
Fossils should be left where they are found.
Model: Fossil Watch BQ9177
Case material:stainless-steel
Case diameter:35 millimeters
Band material:stainless-steel
Band length:mens-standard
Dial color:Stainless steel case, Blue degrade dial with 3 si
Calendar:day-and-date
Movement:analog-quartz
Water resistant depth:100 Meters
Large Phylloceratid fragment. R16/f6960? note the faint ribs across the venter. Also the complex suture patterns peeping through the grubby matrix.
Found this fossil on the shore of Lake Michigan in Charlevoix.
I took it to a prof at Michigan State University in E. Lansing. He said it was millions of years old. Some kind of ancient squid creature. He said this type of fossil is fairly common for the Lake Michigan area.
The prof was an expert on ancient sea sharks.
Moving it with the John Deere. Thankfully we where already down there repairing gabions since the tide was way out.