Pore‐size constraints on the activity and survival of subsurface bacteria in a late cretaceous shale‐sandstone sequence, northwestern New Mexico

1997 ◽  
Vol 14 (3) ◽  
pp. 183-202 ◽  
Author(s):  
J. K. Fredrickson ◽  
J. P. McKinley ◽  
B. N. Bjornstad ◽  
P. E. Long ◽  
D. B. Ringelberg ◽  
...  
Keyword(s):  
New Mexico ◽  
Pore Size ◽  
Late Cretaceous ◽  
Size Constraints

scholarly journals Transitional evolutionary forms in chasmosaurine ceratopsid dinosaurs: evidence from the Campanian of New Mexico

PeerJ ◽  
2020 ◽  
Vol 8 ◽  
pp. e9251
Author(s):  
Denver W. Fowler ◽  
Elizabeth A. Freedman Fowler
Keyword(s):  
New Mexico ◽  
Phylogenetic Relationship ◽  
Late Cretaceous ◽  
Phylogenetic Hypothesis ◽  
Stepwise Change ◽  
Horseshoe Canyon Formation

Three new chasmosaurines from the Kirtland Formation (~75.0–73.4 Ma), New Mexico, form morphological and stratigraphic intermediates between Pentaceratops (~74.7–75 Ma, Fruitland Formation, New Mexico) and Anchiceratops (~72–71 Ma, Horseshoe Canyon Formation, Alberta). The new specimens exhibit gradual enclosure of the parietal embayment that characterizes Pentaceratops, providing support for the phylogenetic hypothesis that Pentaceratops and Anchiceratops are closely related. This stepwise change of morphologic characters observed in chasmosaurine taxa that do not overlap stratigraphically is supportive of evolution by anagenesis. Recently published hypotheses that place Pentaceratops and Anchiceratops into separate clades are not supported. This phylogenetic relationship demonstrates unrestricted movement of large-bodied taxa between hitherto purported northern and southern provinces in the late Campanian, weakening support for the hypothesis of extreme faunal provincialism in the Late Cretaceous Western Interior.

Late Cretaceous Angiosperm Woods from the McRae Formation, South-Central New Mexico, USA: Part 2

2018 ◽  
Vol 179 (2) ◽  
pp. 136-150 ◽  
Author(s):  
Emilio Estrada-Ruiz ◽  
Elisabeth A. Wheeler ◽  
Garland R. Upchurch ◽  
Greg H. Mack
Keyword(s):  
New Mexico ◽  
Late Cretaceous ◽  
South Central

Late cretaceous dinosaurs from the ringbone formation, southwestern New Mexico, U.S.A.

1990 ◽  
Vol 11 (4) ◽  
pp. 343-349 ◽  
Author(s):  
Spencer G. Lucas ◽  
George Basabilvazo ◽  
Timothy F. Lawton
Keyword(s):  
New Mexico ◽  
Late Cretaceous

THE INFLUENCE OF HYDRODYNAMIC FORCES ON TRACK MORPHOLOGY: TURTLE TRACKS FROM THE LATE CRETACEOUS CREVASSE CANYON FORMATION, NEW MEXICO

2017 ◽  
Author(s):  
Holley Elane Smart ◽  
◽  
M. Ryan King ◽  
M. Ryan King ◽  
Joshua A. Smith ◽  
...  
Keyword(s):  
New Mexico ◽  
Late Cretaceous ◽  
Hydrodynamic Forces

NEW LATE CRETACEOUS (EARLY CAMPANIAN) MICROFOSSIL ASSEMBLAGE FROM THE UPPER CRETACEOUS OF NEW MEXICO

2018 ◽  
Author(s):  
Austin Michael Deans ◽  
◽  
Amanda Hendrix ◽  
Caleb Lewis ◽  
Spencer G. Lucas ◽  
...  
Keyword(s):  
New Mexico ◽  
Late Cretaceous ◽  
Upper Cretaceous ◽  
Microfossil Assemblage

G. G. Simpson as Sam Magruder: Concession to the Ineluctable

1997 ◽  
Vol 16 (1) ◽  
pp. 44-49
Author(s):  
Léo Laporte
Keyword(s):  
Quantum Theory ◽  
New Mexico ◽  
Science Fiction ◽  
Late Cretaceous ◽  
Historical Contingency ◽  
Main Interest ◽  
Fatal Accident ◽  
Philosophy Of Life ◽  
Time Motion ◽  
Meaning And Purpose

In a posthumously published work of science fiction (The Dechronization of Sam Magruder, St. Martin's Press, 1996) the American paleontologist George G. Simpson (1902-1984) tells the story of Sam Magruder, a "chronologist" living in 2162 A.D, who was experimenting on the "quantum theory of time-motion" when he suffers a "time-slip" that puts him back in the Late Cretaceous of New Mexico. Helplessly lost in time and with no hope of returning to the present, Magruder ekes out a primitive existence for some years until a fatal accident befalls him. Before his death Magruder manages to chisel out his experience and philosophy of life on eight rock slabs that are recovered many millions of years later; and so his story becomes known and discussed by several Everyman characters. Simpson spins a reasonably engaging tale, but its main interest is the degree to which Magruder's philosophy of life may reflect Simpson's own feelings toward the end of his life. Always more comfortable in expressing his views in writing than in speaking, Simpson appears to use this work of science fiction to reveal his own, mostly melancholy, views about life's meaning and purpose, the importance of adapting to the here-and-now, and how historical contingency controls subsequent outcomes. Is Simpson speaking for himself when Magruder declares "My real purpose in engraving these slabs is a search for comprehension … I am exploring my own nature"?

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