Extraordinary Common Teeth

[isurus90064]

Cretolamna twiggensis

 

Late Eocene - Priabonian

Samlat Formation - Guerran Member - Unit 2

~38-34 Ma

Western Sahara

South of ad-Dakhla

 

Adnet, Tabuce, Cappetta, 2010.

A Middle-Late Eocene vertebrate fauna (marine fish and mammals) from southwestern Morocco; preliminary report: Age and palaeobiogeographical implications.

 

Image on right are partials from a variety of species from this location.

 

 

[isurus90064]

Isurus praecursor

 

Late Eocene - Priabonian

Samlat Formation - Guerran Member - Unit 2

~38-34 Ma

Western Sahara

South of ad-Dakhla

 

[isurus90064]

On 2/8/2010 at 8:40 PM, isurus90064 said:

Adding another tooth .. 3.75" from Harleyville, SC

 

 

Adding some new pics to an older post

[isurus90064]

Adding some new ones and staying in the Eocene ..

 

Isurus praecursor

 

"Blue Circle Quarry"

Eocene

Harleyville

Dorchester County, SC

 

[isurus90064]

Isurus praecursor

 

"Blue Circle Quarry"

Eocene

Harleyville

Dorchester County, SC

 

[isurus90064]

Isurus praecursor

 

"Blue Circle Quarry"

Eocene

Harleyville

Dorchester County, SC

 

[isurus90064]

Isurus praecursor

 

"Blue Circle Quarry"

Eocene

Harleyville

Dorchester County, SC

 

[fossilselachian]

1 hour ago, isurus90064 said:

 

Adding some new pics to an older post

Super ric Marcel!!

[isurus90064]

Tx, it's not as nice as some of the ones you have in your gallery (which I think you should post here :-); I know you've posted some of them on this thread in the past, but not all).

[isurus90064]

Isurus praecursor

 

"Blue Circle Quarry"

Eocene

Harleyville

Dorchester County, SC

 

[isurus90064]

Isurus praecursor

 

"Blue Circle Quarry"

Eocene

Harleyville

Dorchester County, SC

 

[isurus90064]

Isurus praecursor

 

"Blue Circle Quarry"

Eocene

Harleyville

Dorchester County, SC

 

[isurus90064]

Isurus desori

 

~1.49" - 3.78cm

 

~25.7 - 23.6 Ma (Edwards et al. 2000)

Late Oligocene - Chattian

Chandler Bridge Formation

Dorchester County

Summerville, SC

 

[isurus90064]

On 1/7/2016 at 12:02 PM, isurus90064 said:

Isurus desori

 

~2.35" - 5.97cm

 

~25.7 - 23.6 Ma (Edwards et al. 2000)

Late Oligocene - Chattian

Chandler Bridge Formation

Dorchester County

Summerville, SC

 

 

 

I put in some higher quality images for this one and the next.

[isurus90064]

On 1/7/2016 at 12:04 PM, isurus90064 said:

Isurus desori

 

~2.44" - 6.20cm

 

~25.7 - 23.6 Ma (Edwards et al. 2000)

Late Oligocene - Chattian

Chandler Bridge Formation

Dorchester County

Summerville, SC

 

 

 

[isurus90064]

Otodus auriculatus

 

Eocene

Harleyville

Dorchester County, SC

 

[isurus90064]

The Pisco Formation in the Sacaco area consists of five localities: El Jahuay (also known as Alto Grande), Aguada de Lomas, Montemar, Sud Sacaco (West) and Sacaco. In addition to the El Jahuay is designated as the lowermost section of the Pisco Formation in the Sacaco area (Muizon and DeVries 1985). The lowest tuff bed at El Jahuay is also the oldest in the Sacaco Basin.

 

Ehret, MacFadden, Jones, DeVries, Foster and Salas-Gismondi, 2012.

ORIGIN OF THE WHITE SHARK CARCHARODON (LAMNIFORMES: LAMNIDAE) BASED ON RECALIBRATION OF THE UPPER NEOGENE PISCO FORMATION OF PERU.

 

Isurus desori

 

~9.5 Ma

Late Miocene

"El Jahuay - Alto Grande"

Sacaco region

Pisco Formation

Peru

 

 

[siteseer]

Hi Isurus90064,

 

Maybe twenty ago, i saw some small teeth from Alto Grande (Heterodontus, Galeorhinus, and some Pristiophorus rostral spines - small spines like the ones from Pyramid Hill, CA).

 

Jess

[isurus90064]

Hey Jess,

 

just a quick photo of a small assemblage that includes some of the teeth you list. Also just realized the Heterodontus tooth is lying upside down.

 

~9.5 Ma

Late Miocene

"El Jahuay - Alto Grande"

Sacaco region

Pisco Formation

Peru

 

[isurus90064]

Matrix piece with meg ...

 

Otodus megalodon

 

"Sharktooth Hill"
~15.5 Ma
Middle Miocene
Roundmountain Silt
Bakersfield, Kern County
CA

 

[isurus90064]

On 3/4/2009 at 5:53 PM, isurus90064 said:

Hey, well I had the privilege to receive something in the mail a few days ago that I can't quite thank the sender enough for. Thanks again John!! This is what he sent me and I must say it's phenomenal. The tooth is a hair over 5 inches! and it's from STH.

I put the tooth in an ultrasonic cleaner and that took care of some of the dirt that was stuck in the root pores on the labial side of the tooth. The lingual side still has quite a bit of that in there ... the picture of the labial side does not do the colors justice and I may have the re-photograph it to get rid of the flash reflection.

 

O. megalodon

 

"Sharktooth Hill"

~15.5 Ma

Middle Miocene

Roundmountain Silt

Bakersfield, Kern County

CA

 

Roundmountain Silt ages:

~15.5-16.3 Ma - Roundmountain Silt strontium-isotope ages (Olson, 1988)

~14.0-15.5 Ma - Roundmountain Silt Luisian benthic foraminiferal fauna (Barron and Isaacs, 2001; Prothero, 2001)

~15.0-16.0 Ma - Roundmountain Silt Denticulopsis lauta A zone diatoms (Barron, 1981; Barron, in Bartow and McDougall, 1984)

~14.5-16.1 Ma - magnetic stratigraphy for the Roundmountain Silt (Prothero, Sanchez, and Denke, 2008)

~15.2-16.0 Ma - magnetic stratigraphy for the middle section of the Roundmountain Silt that includes the bonebed (Prothero, Sanchez, and Denke, 2008)

~15.5 Ma - magnetic stratigraphy for the bonebed itself (Prothero, Sanchez, and Denke, 2008)

~14.5-16.1 Ma - best correlation for the Roundmountain Silt (Prothero, Sanchez, and Denke, 2008)

 

 

 

 

Replicated the old pics at a higher quality with better lighting ..

[isurus90064]

This one is pretty special, it is almost 6 inches, which for Sharktooth Hill is very large. It is also pathological as in a double tipped tooth. One other noteworthy characteristic is that even teeth this large from this location and time period will still exhibit some minor vestige of a cusp (see pics).

 

"Sharktooth Hill"

~15.5 Ma

Middle Miocene

Roundmountain Silt

Bakersfield, Kern County

CA

 

Roundmountain Silt ages:

~15.5-16.3 Ma - Roundmountain Silt strontium-isotope ages (Olson, 1988)

~14.0-15.5 Ma - Roundmountain Silt Luisian benthic foraminiferal fauna (Barron and Isaacs, 2001; Prothero, 2001)

~15.0-16.0 Ma - Roundmountain Silt Denticulopsis lauta A zone diatoms (Barron, 1981; Barron, in Bartow and McDougall, 1984)

~14.5-16.1 Ma - magnetic stratigraphy for the Roundmountain Silt (Prothero, Sanchez, and Denke, 2008)

~15.2-16.0 Ma - magnetic stratigraphy for the middle section of the Roundmountain Silt that includes the bonebed (Prothero, Sanchez, and Denke, 2008)

~15.5 Ma - magnetic stratigraphy for the bonebed itself (Prothero, Sanchez, and Denke, 2008)

~14.5-16.1 Ma - best correlation for the Roundmountain Silt (Prothero, Sanchez, and Denke, 2008)

 

[isurus90064]

showing some of the detail ...

 

[isurus90064]

Tooth in the hand ...

 

[fossilselachian]

The STH meg collection grows nicely!!