Rapid change in high-elevation precipitation patterns of western North America during the Middle Eocene Climatic Optimum (MECO)

2015 ◽  
Vol 315 (4) ◽  
pp. 317-336 ◽  
Author(s):  
A. Mulch ◽  
C. P. Chamberlain ◽  
M. A. Cosca ◽  
C. Teyssier ◽  
K. Methner ◽  
...  
Keyword(s):  
North America ◽  
Middle Eocene ◽  
Rapid Change ◽  
High Elevation ◽  
Western North America ◽  
Precipitation Patterns ◽  
Climatic Optimum

scholarly journals Rapid Middle Eocene temperature change in western North America

2016 ◽  
Vol 450 ◽  
pp. 132-139 ◽  
Author(s):  
Katharina Methner ◽  
Andreas Mulch ◽  
Jens Fiebig ◽  
Ulrike Wacker ◽  
Axel Gerdes ◽  
...  
Keyword(s):  
North America ◽  
Temperature Change ◽  
Middle Eocene ◽  
Western North America

scholarly journals A 5200-year record of freshwater availability for regions in western North America fed by high-elevation runoff

2011 ◽  
Vol 38 (11) ◽  
pp. n/a-n/a ◽  
Author(s):  
Brent B. Wolfe ◽  
Thomas W. D. Edwards ◽  
Roland I. Hall ◽  
John W. Johnston
Keyword(s):  
North America ◽  
High Elevation ◽  
Western North America ◽  
Freshwater Availability

scholarly journals Holocene Moraines and Rock Glaciers in the Central Ben Ohau Range, South Canterbury, New Zealand

1967 ◽  
Vol 6 (47) ◽  
pp. 737-748 ◽  
Author(s):  
V. R. McGregor
Keyword(s):  
New Zealand ◽  
North America ◽  
Southern Alps ◽  
Western North America ◽  
Rock Glaciers ◽  
Climatic Optimum ◽  
New Formation

Young moraines and rock glaciers in the central part of the Ben Ohau Range, about 42 km. south of the highest peaks of the Southern Alps, are briefly described. A new formation, the Ben Ohau Formation, consisting of the Ferintosh, Jacks Stream and Dun Fiunary Members, is proposed for moraines and rock glaciers believed to have been built since the climatic optimum by three minor glacial advances. Moraines, and outwash and fan gravels, deposited during a more extensive pre-climatic optimum advance which was contemporaneous with the Cockburn Glacial Phase (Cochrane) in North America are assigned to the Birch Hill Formation. The sequence of glacial advances recorded in the Ben Ohau Range is compared with that found in western North America.

The oldest Inocelliidae (Raphidioptera) from the Eocene of western North America

2019 ◽  
Vol 151 (04) ◽  
pp. 521-530 ◽  
Author(s):  
Vladimir N. Makarkin ◽  
S. Bruce Archibald ◽  
James E. Jepson
Keyword(s):  
New Species ◽  
North America ◽  
New Genus ◽  
Middle Eocene ◽  
Hind Wing ◽  
Western North America ◽  
Northwestern Montana ◽  
The Family ◽  
Okanagan Highlands ◽  
One New Species

AbstractOne new genus of Inocelliidae (Raphidioptera) with one new species and one undetermined specimen is described from the Eocene of North America: Paraksenocellia borealis new genus, new species from the early Eocene (Ypresian) Okanagan Highlands shale at Driftwood Canyon, British Columbia, Canada (a forewing), and Paraksenocellia species from the middle Eocene (Lutetian) of the Coal Creek Member of the Kishenehn Formation, northwestern Montana, United States of America (a hind wing). These are the oldest records of the family. The new genus possesses many character states that are rare in Inocelliidae, e.g., a very long pterostigma extending to ScP in both the forewings and hind wings; the forewing subcostal space has three crossveins; the forewing and hind wing AA1 are deeply forked; the crossvein between CuA and CuP is located far distad the crossvein 1r-m. Paraksenocellia is confidently a member of the Inocelliidae, as it possesses a proximal shift of the basal crossvein 1r-m (connecting R and M) in the forewing and the loss of the basal crossvein 1r-m in the hind wing, both apomorphies of the family. It shares some character states with the Mesozoic Mesoraphidiidae, which we consider to be mostly stem-group plesiomorphies.

scholarly journals Winged fruits of rutaceous affinity from the Eocene of western North America

2020 ◽  
Vol 76 (2) ◽  
pp. 211-216
Author(s):  
Steven R. Manchester ◽  
Kory A. Disney ◽  
Kasey K. Pham
Keyword(s):  
North America ◽  
New Genus ◽  
Middle Eocene ◽  
Early Eocene ◽  
Western North America ◽  
New Genus And Species ◽  
Modern Genus ◽  
Trail Formation ◽  
Fruit Surface

A new kind of fin-winged fruit is recognized from lacustrine shales of the early Eocene Tepee Trail Formation of northwestern Wyoming and from the middle Eocene Clarno Formation of central Oregon, USA. The fruits are obovate with five thick lateral wings, borne on a thick pedicel and bearing scars of hypogynous perianth and disk. The fruit surface is covered with small circular dots interpreted as glands. This combination of characters leads us to infer affinities with the Rutaceae, although no identical modern genus is known. We establish the new genus and species, Quinquala obovata.

Phylogenetic relationships within hump-winged grigs, Cyphoderris (Insecta, Orthoptera, Tettigonioidea, Haglidae)

2005 ◽  
Vol 83 (7) ◽  
pp. 1003-1011 ◽  
Author(s):  
M Kumala ◽  
D A McLennan ◽  
D R Brooks ◽  
A C Mason
Keyword(s):  
Phylogenetic Analysis ◽  
North America ◽  
Geographic Distribution ◽  
Phylogenetic Relationships ◽  
High Elevation ◽  
Consistency Index ◽  
Coniferous Forests ◽  
Western North America ◽  
Cold Adapted ◽  
Almost All

The genus Cyphoderris, or hump-winged grigs, is represented by three species of cold-adapted, acoustic Ensifera with a geographic distribution that is generally restricted to the high-elevation coniferous forests of western North America. A phylogenetic analysis based on 29 morphological and 3 behavioural characters produced one tree, (C. buckelli (C. strepitans, C. monstrosa)) with a consistency index of 1.0. We discuss possible explanations for the observation that almost all of the autapomorphic change was concentrated in C. monstrosa.

scholarly journals Holocene Moraines and Rock Glaciers in the Central Ben Ohau Range, South Canterbury, New Zealand

1967 ◽  
Vol 6 (47) ◽  
pp. 737-748 ◽  
Author(s):  
V. R. McGregor
Keyword(s):  
New Zealand ◽  
North America ◽  
Southern Alps ◽  
Western North America ◽  
Rock Glaciers ◽  
Climatic Optimum ◽  
New Formation

Young moraines and rock glaciers in the central part of the Ben Ohau Range, about 42 km. south of the highest peaks of the Southern Alps, are briefly described. A new formation, the Ben Ohau Formation, consisting of the Ferintosh, Jacks Stream and Dun Fiunary Members, is proposed for moraines and rock glaciers believed to have been built since the climatic optimum by three minor glacial advances. Moraines, and outwash and fan gravels, deposited during a more extensive pre-climatic optimum advance which was contemporaneous with the Cockburn Glacial Phase (Cochrane) in North America are assigned to the Birch Hill Formation. The sequence of glacial advances recorded in the Ben Ohau Range is compared with that found in western North America.

North–South Precipitation Patterns in Western North America on Interannual-to-Decadal Timescales

1998 ◽  
Vol 11 (12) ◽  
pp. 3095-3111 ◽  
Author(s):  
Michael D. Dettinger ◽  
Daniel R. Cayan ◽  
Henry F. Diaz ◽  
David M. Meko
Keyword(s):  
North America ◽  
Western North America ◽  
Precipitation Patterns
Sign in / Sign up

Export Citation Format

Share Document