scholarly journals Major and trace element analyses of drill cores from thermal areas in Yellowstone National Park, Wyoming

1984 ◽  
Author(s):  
M.H. Beeson ◽  
K.E. Bargar
Keyword(s):  
Trace Element ◽  
Yellowstone National Park ◽  
National Park ◽  
Drill Cores

Recent Research on Obsidian from Iowa Archaeological Sites

1986 ◽  
Vol 51 (4) ◽  
pp. 837-852 ◽  
Author(s):  
Duane C. Anderson ◽  
Joseph A. Tiffany ◽  
Fred W. Nelson
Keyword(s):  
Trace Element ◽  
Analytical Methods ◽  
Yellowstone National Park ◽  
National Park ◽  
Trace Element Analysis ◽  
Archaeological Sites ◽  
Middle Woodland ◽  
Element Analysis

In this paper we summarize the results of six years of passive obsidian collecting in Iowa during which time 31 samples were obtained and subjected to trace element analysis. We find that: (1) 74% of the obsidian originated at the Obsidian Cliff Quarry in Yellowstone National Park, Wyoming; and (2) in contrast with earlier midwestern studies where obsidian was found in ritual contexts on Middle Woodland sites, the Iowa material is associated with a broader temporal range and on sites where ritual use is not evident. A discussion of the analytical methods used is provided as well as of previous research on midwestern obsidian finds.

Ultrastructural Localization of Phycocyanin in the Acidophilic, Thermophilic Alga, Cyanidium Caldarium

1973 ◽  
Vol 31 ◽  
pp. 462-463
Author(s):  
M. R. Edwards ◽  
J. D. Mainwaring
Keyword(s):  
Yellowstone National Park ◽  
National Park ◽  
Ultrastructural Localization ◽  
Review Of Literature ◽  
Cyanidium Caldarium ◽  
Taxonomic Rank ◽  
Thin Sections ◽  
Standard Methods ◽  
Laboratory Cultures

Although the general ultrastructure of Cyanidium caldarium, an acidophilic, thermophilic alga of questionable taxonomic rank, has been extensively studied (see review of literature in reference 1), some peculiar ultrastructural features of the chloroplast of this alga have not been noted by other investigators.Cells were collected and prepared for thin sections at the Yellowstone National Park and were also grown in laboratory cultures (45-52°C; pH 2-5). Fixation (glutaraldehyde-osmium), dehydration (ethanol), and embedding (Epon 812) were accomplished by standard methods. Replicas of frozenfracture d- etched cells were obtained in a Balzers apparatus. In addition, cells were examined after disruption in a French Press.

Reproductive Characteristics of Red-Tailed Hawks in Yellowstone National Park, an Intact Temperate Landscape

2019 ◽  
Vol 53 (3) ◽  
pp. 309
Author(s):  
Lauren E. Walker ◽  
Lisa M. Baril ◽  
David B. Haines ◽  
Douglas W. Smith
Keyword(s):  
Yellowstone National Park ◽  
National Park ◽  
Reproductive Characteristics
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