Early oligocene palynosequences in the eastern Gulf Coast, U.S.A.

Plants in movement – Floristic and climatic characterization of the New Jersey hinterland during the Palaeogene–Neogene transition in relation to major glaciation events

“…Relative abundances of pollen grains of Engelhardioideae or Carya in our investigation reveal similar values when compared to data from the 10 eastern coast of the Gulf of Mexico and South Carolina for the Late Eocene/Early Oligocene (Frederiksen, 1991;Oboh and Reeves Morris, 1994;Oboh et al, 1996). The recorded pollen percentages differ significantly from the values revealed for the late Mid-Miocene (Prader et al, 2017).…”

“…A late Eocene to early Oligocene palynofloristic record from southern Mississippi and Alabama (Oboh and Reeves Morris, 1994;Oboh et al, 1996) revealed that oaks became dominant at the Eocene-Oligocene boundary in the southeastern USA, 20 probably indicating a vegetation shift triggered by cooling, as already suggested by Frederiksen (1991). In North America, the fossil record of Quercus implies that four infrageneric groups had existed during the Cenozoic (Denk et al, 2010 and references therein).…”

Origin and Growth Mechanism of Authigenic Chlorite in Sandstones of the Lower Vicksburg Formation, South Texas

“…Early Oligocene paleolatitude reconstructions place McAllen Ranch field at approximately 24.5Њ to 25Њ north (Barron et al 1981;Zachos et al 1994). Oboh et al (1996) and Oboh and Reeves-Morris (1994) analyzed paleofloristic patterns in the Vicksburg Group of southern Mississippi and Alabama and concluded that the palynomorph assemblage was indicative of a warm temperate climate in the northern Gulf (paleolatitude ϳ 28ЊN; Barron et al 1981). No such data exist for South Texas, which is approximately 3Њ farther south.…”

New Jersey's paleoflora and eastern North American climate through Paleogene–Neogene warm phases

“…Modern oak lineages became established during the early Paleogene (Barrón et al, 2017), for which the first unequivocal fossil evidence in North America is from Oregon (late early Eocene; Manchester, 1994Manchester, , 2011. A palynofloristic record from southern Mississippi and Alabama (Oboh and Reeves Morris, 1994;Oboh et al, 1996) revealed that oaks became dominant around the Eocene-Oligocene boundary in southeastern North America. The vegetation shift was potentially triggered by cooling and drying, as suggested by Frederiksen (1980Frederiksen ( , 1991.…”