James Hagadorn on Muck Rack

James Hagadorn

Denver
As seen in: Nature, Wiley Online Library, Science Magazine, The Aspen Times, The Pueblo Chieftain, Vail Daily, Summit Daily News, Greeley Tribune, The Journal of Pediatrics, Post Independent and
Curator of rocks, minerals, meteorites, fossils, and when possible, old cars. Views my own.
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Articles

Evolutionary escalation in an exceptionally preserved Cambrian biota from the Grand Canyon (Arizona, USA)

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By Giovanni Mussini, James Hagadorn, Anne Miller, Karl E. Karlstrom
| Science Magazine Verified
Abstract Exceptionally preserved fossil assemblages, or Konservat-Lagerstätten, open direct windows on non-biomineralized faunas that chronicle the Cambrian radiation of animal phyla. However, these assemblages do not typically capture the well-oxygenated, resource-rich environments sustaining most metazoan diversity in modern marine systems.
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Frenchman Mountain Dolostone: A new formation of the Cambrian Tonto Group, Grand Canyon and Basin and Range, USA

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By Stephen Rowland, James Hagadorn, Denver Museum
We describe, interpret, and establish a stratotype for the Frenchman Mountain Dolostone (FMD), a new Cambrian stratigraphic unit that records key global geochemical and climate signals and is well exposed throughout the Grand Canyon and central Basin and Range, USA.
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An abundant sea anemone from the Carboniferous Mazon Creek Lagerstӓtte, USA

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By Roy E Plotnick, Graham Young, James Hagadorn
| Wiley Online Library Verified
Morphological reconstruction Based on a combined consideration of the preserved features, the morphology of modern anemones, and the role of taphonomy, we can reasonably reconstruct the original morphology of Essexella (Fig. 11) and its modification by post-mortem processes. First, although many specimens are nearly flat and have little relief (Figs 1H, 2A, C, 7B, D), some show substantial three-dimensional structure (Figs 1A, C, 5A–C, 6A).
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