Ichnology of a late Pleistocene ichnofabric, Nebraska, USA

Vertebrate burrows in late pleistocene paleosols at Korean Palaeolithic sites and their significance as a stratigraphic marker

“…Radiocarbon dating of burrow fills can determine the age of organic materials in the fills, but this may only indicate the age of pedogenic organic accumulation within the burrows and not the actual age of the burrowing activity itself. OSL dating of the surrounding matrix only gives a maximum age limit on the burrowing event (Tobin, 2004b). In order to constrain the age of these burrowing events, the soil-wedge layers overlying the burrow-bearing layer, burrow-fill materials, and soil and fluvial sand samples underlying the burrow layer, were dated using tephrochronology, radiocarbon, and OSL techniques.…”

“…The age, architecture, and size of these burrows in Korea are remarkably similar to those of the Citellus zone in Nebraska (ca. 22,000 to 40,000 yr), which is defined as a regionally extensive biohorizon with abundant burrows and remains of ground squirrels and other rodents (Tobin, 2004a(Tobin, , 2004b. Although further study is needed to clarify the affinities of these burrows, the synchronous occurrence and architectural resemblance of burrows in both regions (NE Asia and N. America) may suggest a similar burrower as well as similarities in paleoclimatic and paleoenvironmental conditions during this cold period.…”

“…Pre-Cenozoic vertebrate burrows have been reported from South Africa (Smith, 1987;Groenewald et al, 2001) and Antarctica (Miller et al, 2001). The best-known ichnofossil vertebrate burrows are Daimonelix, which are interpreted to have been produced by the Miocene beaver Paleocaster (Voorhies, 1975;Martin and Bennett, 1977), and the Citellus zone produced by late Pleistocene ground squirrels and other rodents (Tobin, 2004a(Tobin, , 2004b.…”

“…Although burrower remains have not been found, based on burrow size and architecture the burrows are interpreted as having been constructed by rodent-like mammals (Lim et al, 2004). Most studies on penetrative burrows in continental deposits have focused on ichnology and their paleoenvironmental and paleoclimatic implications (e.g., Miller et al, 2001;Tobin, 2004aTobin, , 2004bHasiotis et al, 2004). In this study we primarily focus on the dating of the burrows and their chronostratigraphic implications.…”

A Preliminary Study of Rodent Burrows at Lake Hovsgol, Mongolia: Comparison with the Late Pleistocene Rodent Burrows of Korea

“…척추동물 서관 구조는 전기 데본기부터 보 고되기 시작하여 (Allen and Williams, 1981;O'Sullivan et al, 1986), 최근에는 플라이스토세 후기의 설치류 서관 구조가 다수 보고된 바 있다 (Lim et al, 2004;Lim et al, 2007;Tobin, 2004aTobin, , 2004bZanina et al, 2011;Pietsch, 2013;Pietsch et al, 2014 (Fig. 2a), 횡단면에서는 완만한 경사를 가지는 직선형의 횡단면이 관찰된다 (Fig.…”