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This thesis contributes to the development of a cryptotephra framework in northwestern North America, providing the initial data for the construction of a regional cryptotephra framework where key cryptotephra layers (those which are widely distributed, easily correlated, and have well...
Subfossil bryophytes in eastern Beringia: their paleoenvironmental and phytogeographical significanceDownload
Doctoral thesis. Bryophytes, more particularly mosses, are used in the paleoenvironmental reconstruction and historical biogeography of eastern Beringia, an area including Alaska and the Yukon. The Old Crow Basin in northern Yukon was studied in detail. // Appendix 2: Subfossil bryophytes...
Doctoral thesis. Critically reviews the art of phytolith analysis and presents new techniques to collection of samples, processing, mounting, and optical and SEM microscopic analyses. Includes results of analyses of samples from the Old Crow Basin, Yukon and lake areas in Alaska.