GLACIATIONS | Mid-Quaternary in North America

Jennings, Carrie E.; Aber, James S.; Balco, Greg; Barendregt, René W.; Bierman, Paul R.; Rovey, Charles W.; Roy, Martin; Thorleifson, Harvey; Mason, Joseph A.

doi:10.1016/b0-44-452747-8/00125-3

Cited by 2 publications

(3 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, our refined age model suggests that the significant evolution of the LIS in the Canadian Arctic began around 790 ka. This timing is consistent with terrestrial records (Barendregt & Duk-Rodkin, 2011;Barendregt & Irving, 1998;Jennings et al, 2007) and underscores that the first prominent influence of LIS evolution in the western Arctic Ocean preceded its manifestation (MIS 16) in the North Atlantic (Figure 6; Hodell et al, 2008;Naafs et al, 2013). Barendregt and Irving (1998) reported that the formation of the Keewatin Ice Center occurred in the Canadian Arctic during the late Matuyama chron (773-1,780 ka), whereas the Labrador Ice Center occupied the North Atlantic sector of North America during the early Matuyama chron (1,780-2,595 ka) (Figure 1).…”

Section: Evolution Of the Laurentide Ice Sheet Since The Early Pleist...supporting

confidence: 89%

“…Using the Mn cyclostratigraphy, Park et al (2020) argued that the first LIS impact on the western Arctic Ocean predates MIS 16. Terrestrial records from North America clearly show that LIS expansion toward Banks Island and Victoria Island in the Canadian Arctic occurred during the late Matuyama chron (Barendregt & Duk-Rodkin, 2011;Barendregt & Irving, 1998;Jennings et al, 2007). Thus, our refined age model suggests that the significant evolution of the LIS in the Canadian Arctic began around 790 ka.…”

Section: Evolution Of the Laurentide Ice Sheet Since The Early Pleist...mentioning

confidence: 76%

See 1 more Smart Citation

Cryospheric and Oceanographic Evolution in the Arctic Makarov Basin Since the Early Pleistocene Revealed by Bulk Mineral Assemblages

Park,

Nam,

Vogt

et al. 2024

Paleoceanog and Paleoclimatol

View full text Add to dashboard Cite

We present the glacial history of the Makarov Basin (western Arctic Ocean) during the last ∼1.1 Myr, with sediment provenances using the newly refined chronostratigraphy of core ARA03B‐41GC02. According to the principal component analysis of the bulk mineral assemblages, felsic minerals were dominant, and their ratios (K‐feldspar/plagioclase and quartz/feldspars) indicated that sediment supply to the Makarov Basin was mainly from the Siberian margin and partly from northern North America, including the Canadian Arctic. However, their occurrence did not vary significantly between interglacials and glacials due to the mixed sources. In contrast, clinopyroxene and dolomite indicated specific sediment origins from the eastern Siberian margin and northern North America, respectively. The clinopyroxene content followed an eccentricity cycle (∼100‐Kyr) during the early to middle Pleistocene, suggesting that the eustatic sea level changes may have influenced its input from the eastern Siberian margin. The dolomite, transported primarily by icebergs from the Arctic sector of the Laurentide Ice Sheet (LIS) in northern North America, has also followed the same cycle since the early Pleistocene. Thus, the mineralogical signals highlight that sediment origins and transport processes in the Makarov Basin were related to ice sheet evolution at the eccentricity cycle. In addition, dolomite deposition in the Makarov Basin began by the early Pleistocene (∼790 ka), ∼150 ka earlier than in previous North Atlantic records (∼640 ka), indicating the earlier LIS calving in the Arctic sector than in the Atlantic sector.

show abstract