Nice Physogaleus contortus Sharktooth Hill Tiger Shark tooth Miocene 039

$16.8 Buy It Now or Best Offer
free,30-Day Returns

Seller Store rickcalif
(2219) 100.0%,

Location: Sacramento, California
Ships to: US,
Item: 322673901339

All returns accepted:Returns Accepted
Item must be returned within:30 Days
Refund will be given as:Money back or replacement (buyer’s choice)
Return shipping will be paid by:Buyer
Restocking Fee:10%
Country/Region of Manufacture:United States
WEIGHT:0.4oz
TIGER SHARK TOOTH LENGTH INCHES:0.87″
COLLECTION SITE:SHARKTOOTH HILL CALIFORNIA

Miocene Sharktooth Hill Tiger Shark teethDescriptionFormation: ROUND MOUNTAIN SILTLocation: SHARKTOOTH HILL BAKERSFIELD, CALIFORNIACountry of Origin: UNITED STATESThis sale is for one Physogaleus contortus (GIBBES, 1849)extinct Tiger-like shark teeth. This is a fairly common in the Sharktooth Hill fauna.P. contortus is generally common in Miocene deposits of Eastern North America.Physogaleus is an extinct genus of requiem shark, which left a fossil record of teeth that are reminiscent of those of Galeocerdo (at least the laterals). In general, the crown is blade-like and distally (weakly or strongly) directed. The mesial cutting-edge continues onto the shoulder and often bears weak serrations. The distal cutting-edge is more upright creating a notch at the distal heel/shoulder. This heel can be strongly serrate with up to four cusplet-like serrations in posterior teeth.Cappetta (1987) notes that there is strong sexual dimorphism of the lower anterior teeth (the cusps of the male’s are laterally compressed), otherwise male and female teeth are of similar design. The basal face of the root can often differentiate upper and lower teeth. In lower teeth, the surface is flat and straight, while in uppers, it is often concave. Positionally, anterior teeth tend to have more erect cusps, few if any distal cusplets, and a stronger lingual root protuberance. In more lateral positions, the cusps become more distally directed, the distal shoulder more serrate and the roots more labio-lingually compressed.Physogaleus teeth have been reported from Cenozoic deposits of Europe, Africa, Asia and North America. The tooth-design is highly variable amongst tooth-positions and individuals; this has led to the erection of numerous species that have later been synonymized with existing taxa The ”Sharktooth Hill” formation is referred to by geologists as the ”Round Mountain Silt”. Located in Kern County, California, it was deposited by a river delta coming out of the mountains to the east of Bakersfield. At this time (Middle Miocene) most of central California was covered by a small sea. The transformation of Bakersfield area from beachfront to near-desert could be summed up as the result of the overall trend of falling sea level, significant uplift of the Sierra Nevadas, and gradual land-locking of the Temblor Sea. The Southern Bakersfield region continued to exist as a swampy area well into the Pleistocene. At the same time the Miocene deposits eroded into a hilly area with many gullies exposing the so-called ”Upper Layer of the Round Mountain Silt”. This is the layer containing the bonebed which has yielded the most diverse and best-studied Tertiary fossil marine vertebrate assemblage yet known from anywhere within the Pacific Realm.This fossil assemblage, called the Sharktooth Hill Local Fauna (Wood et al., 1941), is comprised of more than one hundred species of sharks, rays, bony fish, turtles, birds and mammals, including terrestrial species from the adjacent Miocene land mass (south of where Bakersfield currently is located). The ”Round Mountain Silt” covers approximately 110 square miles. The Sharktooth Hill Bonebed is a single, relatively thin, but widespread horizon — this fossil producing layer is only 6-8″ thick (with some exceptions). The STH Bonebed was recently assigned a Middle Miocene age between 15.2 and 16.0 million years old by Sanchez & Prothero (2003).

Frequently Asked Questions About Nice Physogaleus contortus Sharktooth Hill Tiger Shark tooth Miocene 039 in My Website

www.malmobeerweek.se is the best online shopping platform where you can buy Nice Physogaleus contortus Sharktooth Hill Tiger Shark tooth Miocene 039 from renowned brand(s). www.malmobeerweek.se delivers the most unique and largest selection of products from across the world especially from the US, UK and India at best prices and the fastest delivery time.

What are the best-selling Nice Physogaleus contortus Sharktooth Hill Tiger Shark tooth Miocene 039 on www.malmobeerweek.se?