scholarly journals Heat flow patterns of the North American continent: A discussion of the DNAG Geothermal Map of North America

1990 ◽  
Author(s):  
David D. Blackwell ◽  
John L. Steele ◽  
Larry C. Carter
Keyword(s):  
North America ◽  
Heat Flow ◽  
North American ◽  
Flow Patterns ◽  
American Continent ◽  
North American Continent ◽  
The North

The species of Thecaphora on Compositae in North America

1982 ◽  
Vol 60 (8) ◽  
pp. 1512-1522 ◽  
Author(s):  
Rubén Durán
Keyword(s):  
New Species ◽  
North America ◽  
North American ◽  
Morphological Characteristics ◽  
American Continent ◽  
Bright Field ◽  
New Host ◽  
North American Continent ◽  
The North ◽  
Scanning Electron

Five new species of Thecaphora collected in Mexico are described, some of which are parasitic on genera of Compositae not previously reported as hosts. Species of Thecaphora on Compositae for the North American continent now total 11. New species include Thecaphora denticulata, T. heliopsidis, T. hennenea, T. melampodii, and T. neo-mexicana. New host genera for North America include Bidens, Heliopsis, and Melampodium. Morphological characteristics of Thecaphora species and taxonomic criteria to delimit them are discussed. Keys to the species, interpretations of spore ball morphology and spore sculpturing, and scanning electron and bright-field micrographs are presented.

scholarly journals THE EFFECT OF THE GLACIAL EPOCH UPON THE DISTRIBUTION OF INSECTS IN NORTH AMERICA

1875 ◽  
Vol 7 (9) ◽  
pp. 164-167
Author(s):  
Aug. R. Grote
Keyword(s):  
United States ◽  
North America ◽  
North American ◽  
The United States ◽  
American Continent ◽  
North American Continent ◽  
The North ◽  
Glacial Epoch

From the condition of an hypothesis the glacial epoch has been elevated into that of a theory by the explanations it has afforded to a certain class of geological phenomena. The present paper endeavors to show that certain zoological facts are consistent with the presence, during past times, of a vast progressive field of ice, which, in its movement from north to south, gradually extended over large portions of the North American continent. These facts, in the present instance, are furnished by a study of our Lepidoptera, or certain kinds of butterflies and moths now inhabiting the United States and adjacent territories.

scholarly journals Low mantle heat flow at the edge of the North American Continent, Voisey Bay, Labrador

2000 ◽  
Vol 27 (6) ◽  
pp. 823-826 ◽  
Author(s):  
J. C. Mareschal ◽  
A. Poirier ◽  
F. Rolandone ◽  
G. Bienfait ◽  
C. Gariépy ◽  
...  
Keyword(s):  
Heat Flow ◽  
North American ◽  
American Continent ◽  
North American Continent ◽  
The North ◽  
Mantle Heat Flow
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