Toward an Absolute Chronology at ELK Lake, Minnesota
نویسندگان
چکیده
منابع مشابه
Elk Lake pollen record
The pollen record from Elk Lake is interpreted in climatic terms by three different numerical approaches. The paleoclimatic record inferred for Elk Lake can be described as a sequence of climatic zones, separated by short transitional intervals: (1) the cold and dry late glacial zone (11,600-11,000 varve yr), (2) the cool and moist early Holocene zone (10,000-8500 varve yr), (3) the warm and dr...
متن کاملVegetation history of Elk Lake
A pollen record from Elk Lake reveals the character and timing of major vegetation changes in northwestern Minnesota for the past 11.6 ka, the past 10.4 ka of which are recorded by varves. Fossil pollen spectra are compared with modern pollen data to identify the closest analogues and thereby to infer past climatic changes. The late glacial Picea assemblage (ca. 11,638-10,000 varve yr) lacks an...
متن کاملShifts in mid- to late-Holocene anion composition in Elk Lake (Grant County, Minnesota): Comparison of diatom and ostracode inferences
The fossil diatom record from Elk Lake (Grant County, Minnesota) was used to reconstruct salinity and brine type between 2640 and 4645 14C yr BP. This lake was selected for a brine-type reconstruction because a previous study using fossil-ostracode assemblages indicated a shift in anion composition during the mid-Holocene (Smith et al., 1997). Salinity was reconstructed using a transfer functio...
متن کاملA chronological framework for the Holocene vegetational history of central Minnesota: the Steel Lake pollen record
Paleorecords from Minnesota and adjacent areas have often been used to evaluate large-scale climatic processes in the midcontinent of North America. However, most of these records are compromised by chronological flaws, making problematic any comparisons with climatic interpretations based on other records (e.g., GISP2 in Greenland). We report here a high-resolution pollen record with a secure ...
متن کاملSan Andreas Fault Earthquake Chronology and Lake Cahuilla History at Coachella, California
The southernmost ∼100 km of the San Andreas fault has not ruptured historically. It is imperative to determine its rupture history to better predict its future behavior. This paleoseismic investigation in Coachella, California, establishes a chronology of at least five and up to seven major earthquakes during the past ∼1100 yr. This chronology yields a range of average recurrence intervals betw...
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ژورنال
عنوان ژورنال: Radiocarbon
سال: 1996
ISSN: 0033-8222,1945-5755
DOI: 10.1017/s0033822200030137