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enamel

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Series: Geological Society, London, Special Publications
Published: 01 January 2018
DOI: 10.1144/SP455.14
EISBN: 9781786203366
... a slightly less pronounced anterior tilt. The crown apex is unworn. The ‘giant fang’ ( Fig. 5c ) was excavated 44 mm from the ‘brown fang’. The height is 20.3 mm, and the shape is basically an elongated version of the ‘brown fang’. The ‘giant fang’ shows a gradual thinning of enamel – from apex to base...
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Journal Article
Journal: PALAIOS
Published: 01 June 2001
PALAIOS (2001) 16 (3): 279-293.
...DAVID L. FOX; DANIEL C. FISHER Abstract The stable carbon and oxygen isotope compositions of serial samples of enamel from tusks of Gomphotherium productus (Mammalia, Proboscidea) from Port of Entry Pit, Oklahoma (early Hemphillian North American Land Mammal Age, ca. 7.5 Ma), were measured...
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Journal Article
Journal: Geology
Published: 01 January 2001
Geology (2001) 29 (1): 27-30.
... and enamel samples from the coexisting fossil layer yield significantly younger apparent ages, that of the enamel sample being only less than one-fourth of the minimum age of Nanjing Man. This suggests that U uptake history is far more complex than existing models can handle. As a result, great care must...
FIGURES
Journal Article
Journal: Paleobiology
Published: 01 January 2000
Paleobiology (2000) 26 (2): 294-309.
...-enamel samples from three time horizons for nine families of Perissodactyla, Proboscidea, and Artiodactyla. The absence of significant alteration of in vivo isotopic signatures can be determined for carbon, thus allowing paleodietary and paleoenvironmental interpretations to be made. While the results...
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Journal Article
Journal: Geology
Published: 01 May 1999
Geology (1999) 27 (5): 439-442.
...Kathryn A. Hoppe; Paul L. Koch; Richard W. Carlson; S. David Webb Abstract Variations in the strontium isotope ratio ( 87 Sr/ 86 Sr) of tooth enamel are used to examine the migration patterns of late Pleistocene mammoths and mastodons from Florida. An animal's 87 Sr/ 86 Sr ratio tracks the ratios...
Journal Article
Journal: Paleobiology
Published: 01 April 1998
Paleobiology (1998) 24 (2): 274-286.
Journal Article
Journal: Geology
Published: 01 March 1998
Geology (1998) 26 (3): 219-222.
... are a “tape recorder” of short-term seasonal variations from the distant past. We have used a new in situ micro-laser sampling method to determine submillimeter carbon and oxygen isotope variations in the enamel of individual fossil horse teeth to assess ancient annual meteoric water variations and feeding...
Journal Article
Published: 01 November 1997
Bulletin de la Société Géologique de France (1997) 168 (6): 767-773.
...Julia A. Lee-Thorp; Lee Manning; Matthew Sponheimer Abstract Stable carbon isotope ratio analysis of carbonate substituted within fossil tooth enamel has been shown to be a useful approach to questions about diets and environments of extinct animals. Tooth enamel appears to be preferable to fossil...
Journal Article
Published: 01 November 1997
Bulletin de la Société Géologique de France (1997) 168 (6): 775-781.
... isotope composition of ungulate tooth dentine and enamel carbonate hydroxylapatite from French Eocene and Oligocene localities was measured in order to use the isotopic analyses to better understand the palaeoenvironmental changes at the Eocene/Oligocene boundary and to tentatively establish a correlation...
Journal Article
Journal: PALAIOS
Published: 01 August 1996
PALAIOS (1996) 11 (4): 306-318.
Journal Article
Journal: PALAIOS
Published: 01 August 1996
PALAIOS (1996) 11 (4): 319-327.
Journal Article
Journal: PALAIOS
Published: 01 August 1996
PALAIOS (1996) 11 (4): 397-408.
Journal Article
Published: 01 November 1995
Journal of Paleontology (1995) 69 (6): 1154-1163.
Journal Article
Journal: Geology
Published: 01 October 1995
Geology (1995) 23 (10): 869-872.
...Henry C. Fricke; James R. O'Neil; Niels Lynnerup Abstract Because the oxygen isotope composition of mammalian tooth enamel (δ 18 O p ) can be used as a proxy for local surface temperature, teeth from archaeological sites can serve as records of climate change on the time scale of decades...
Journal Article
Published: 01 May 1994
Canadian Journal of Earth Sciences (1994) 31 (5): 783-792.
... as within a locality or even a single tooth. The chemical composition of fossil enamel is close to that of modern enamel, whereas the chemical compositions of fossil and modern dentine are very different. It seems that fossil enamel may have retained some paleodietary information in its chemical composition...
Journal Article
Journal: Paleobiology
Published: 01 January 1994
Paleobiology (1994) 20 (1): 5-13.
Journal Article
Published: 01 May 1987
Canadian Journal of Earth Sciences (1987) 24 (5): 1022-1037.
...Rainer Grün; Henry P. Schwarcz; Steve Zymela Abstract The amplitude of the electron spin resonance (ESR) peak at g = 2.0018 for hydroxyapatite of fossil tooth enamel can be used to measure the acquired radiation dose (AD) and thus the time ( T ) since burial of the tooth in a sediment...
Journal Article
Journal: Paleobiology
Published: 01 April 1983
Paleobiology (1983) 9 (2): 138-149.