Search results
Results from the WOW.Com Content Network
Like other fossils, coprolites have had much of their original composition replaced by mineral deposits such as silicates and calcium carbonates. Paleofeces, on the other hand, retain much of their original organic composition and can be reconstituted to determine their original chemical properties, though in practice the term coprolite is also ...
Because nummulites are very abundant, easy to recognize, and lived in certain biozones, they are used as guide fossils.It is worth highlighting that thanks to the appearance of Nummulites tavertetensis in the Shallow Bentic Zone 15 (SBZ 15), it was possible to date the oldest fossil remains of Sirenio in Western Europe found in a new paleontological site, in Santa Brígida, Amer (La Selva ...
This list of fossil sites is a worldwide list of localities known well for the presence of fossils. Some entries in this list are notable for a single, unique find, while others are notable for the large number of fossils found there.
Articulated ostracod valves in cross-section from the Permian of central Texas; typical thin section view of an ostracod fossil A new method is in development called mutual ostracod temperature range (MOTR), similar to the mutual climatic range (MCR) used for beetles, which can be used to infer palaeotemperatures. [ 28 ]
Index fossils must have a short vertical range, wide geographic distribution and rapid evolutionary trends. Another term, "zone fossil", is used when the fossil has all the characters stated above except wide geographical distribution; thus, they correlate the surrounding rock to a biozone rather than a specific time period.
The youngest fossils of the mainland population are from the Kyttyk Peninsula of Siberia and date to 9,650 years ago. [ 115 ] [ 121 ] Woolly mammoth and muskox remains displayed on Wrangel Island (left) and a skeleton being excavated on the Taymyr Peninsula (right), places where mammoths survived until about 4,000 years ago
Fossil of Parapuzosia seppenradensis, one of the largest known ammonites. The smallest ammonoid was Maximites from the Upper Carboniferous. Adult specimens reached only 10 mm (0.39 in) in shell diameter. [36] Few of the ammonites occurring in the lower and middle part of the Jurassic period reached a size exceeding 23 cm (9.1 in) in diameter.
Styracosaurus (/ s t ɪ ˌ r æ k ə ˈ s ɔːr ə s / sti-RAK-ə-SOR-əs; meaning "spiked lizard" from the Ancient Greek styrax / στύραξ "spike at the butt-end of a spear-shaft" and sauros / σαῦρος "lizard") [1] is an extinct genus of herbivorous ceratopsian dinosaur from the Late Cretaceous (Campanian stage) of North America.