Book contents
- Frontmatter
- Contents
- Contributors
- Preface
- PART I The Chronostratigraphy of the Uintan through Arikareean
- 1 Magnetic stratigraphy and biostratigraphy of the middle Eocene Uinta Formation, Uinta Basin, Utah
- 2 Biostratigraphy and magnetostratigraphy of the Bridgerian-Uintan Washakie Formation, Washakie Basin, Wyoming
- 3 Magnetic stratigraphy, sedimentology, and mammalian faunas of the early Uintan Washakie Formation, Sand Wash Basin, northwestern Colorado
- 4 Theoretical biochronology, the Bridgerian-Uintan boundary and the “Shoshonian Subage” of the Uintan
- 5 Middle Eocene mammalian faunas of San Diego County, California
- 6 Stratigraphy and paleomagnetism of the middle Eocene Friars Formation and Poway Group, southwestern San Diego County, California
- 7 Magnetostratigraphy of the upper middle Eocene Coldwater Sandstone, central Ventura County, California
- 8 Stratigraphy and paleomagnetism of the upper middle Eocene to lower Miocene (Uintan to Arikareean) Sespe Formation, Ventura County, California
- 9 Magnetostratigraphy of the Eocene-Oligocene transition in Trans-Pecos Texas
- 10 Magnetic stratigraphy of the Duchesnean part of the Galisteo Formation, New Mexico
- 11 Stratigraphy and vertebrate faunas of the Bridgerian-Duchesnean Clarno Formation, north-central Oregon
- 12 Eocene-Oligocene faunas of the Cypress Hills Formation, Saskatchewan
- 13 Magnetic stratigraphy of the White River Group in the High Plains
- 14 Magnetostratigraphy and biostratigraphy of the Eocene-Oligocene transition, southwestern Montana
- 15 The Whitneyan-Arikareean transition in the High Plains
- PART II Common Vertebrates of the White River Chronofauna
- Summary
- Index
10 - Magnetic stratigraphy of the Duchesnean part of the Galisteo Formation, New Mexico
Published online by Cambridge University Press: 06 July 2010
- Frontmatter
- Contents
- Contributors
- Preface
- PART I The Chronostratigraphy of the Uintan through Arikareean
- 1 Magnetic stratigraphy and biostratigraphy of the middle Eocene Uinta Formation, Uinta Basin, Utah
- 2 Biostratigraphy and magnetostratigraphy of the Bridgerian-Uintan Washakie Formation, Washakie Basin, Wyoming
- 3 Magnetic stratigraphy, sedimentology, and mammalian faunas of the early Uintan Washakie Formation, Sand Wash Basin, northwestern Colorado
- 4 Theoretical biochronology, the Bridgerian-Uintan boundary and the “Shoshonian Subage” of the Uintan
- 5 Middle Eocene mammalian faunas of San Diego County, California
- 6 Stratigraphy and paleomagnetism of the middle Eocene Friars Formation and Poway Group, southwestern San Diego County, California
- 7 Magnetostratigraphy of the upper middle Eocene Coldwater Sandstone, central Ventura County, California
- 8 Stratigraphy and paleomagnetism of the upper middle Eocene to lower Miocene (Uintan to Arikareean) Sespe Formation, Ventura County, California
- 9 Magnetostratigraphy of the Eocene-Oligocene transition in Trans-Pecos Texas
- 10 Magnetic stratigraphy of the Duchesnean part of the Galisteo Formation, New Mexico
- 11 Stratigraphy and vertebrate faunas of the Bridgerian-Duchesnean Clarno Formation, north-central Oregon
- 12 Eocene-Oligocene faunas of the Cypress Hills Formation, Saskatchewan
- 13 Magnetic stratigraphy of the White River Group in the High Plains
- 14 Magnetostratigraphy and biostratigraphy of the Eocene-Oligocene transition, southwestern Montana
- 15 The Whitneyan-Arikareean transition in the High Plains
- PART II Common Vertebrates of the White River Chronofauna
- Summary
- Index
Summary
ABSTRACT
Two sections of the Galisteo Formation in central New Mexico, which contain the Duchesnean Tonque local fauna, were sampled for magnetic polarity stratigraphy. The section at Arroyo del Tuerto is of mixed polarity, and probably correlates with Chrons C17r1 to C17n3 (37.5-38.0 Ma), based on similarities with other well-dated Duchesnean faunas. The section of the type Galisteo Formation in the Cerrillos area is mostly of reversed polarity, and probably correlates with Chron C17r (38.0-38.5 Ma) based on comparisons of its faunas to other late Duchesnean faunas.
INTRODUCTION
In the southwestern United States, the sharpest pulse of the Laramide orogeny began during the middle Eocene. In northern New Mexico and Colorado, the northeastwardly moving Colorado Plateau impinged upon the basement buttresses of the Rocky Mountain foreland, producing significant tectonism. This formed a series of en-echelon, asymmetric downwarps, and tilted and subsided blocks that Chapin and Cather (1981) referred to as Echo Park-type basins, and Dickinson et al. (1988) referred to as axial basins.
One of these basins was the Galisteo-El Rito basin of north-central New Mexico. Its principal basin fill, the Galisteo Formation, is as much as 1300 m thick and consists of fluvial sandstone, mudstone, and conglomerate (Gorham and Ingersoll, 1979) (Fig. 1). Two Eocene fossil mammal local faunas (l.f.) are known from the Galisteo Formation. The lower part of the unit produces the Cerrillos local fauna of Wasatchian age, and the upper part produces the Tonque local fauna of Duchesnean age (Fig. 1; see also Lucas, 1982).
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- The Terrestrial Eocene-Oligocene Transition in North America , pp. 199 - 205Publisher: Cambridge University PressPrint publication year: 1996
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