RECOGNITION OF A TRANSGRESSIVE CARBONATE SEQUENCE WITHIN AN EPEIRIC SEA: HELDERBERG GROUP (LOWER DEVONIAN) OF NEW YORK STATE

Glacial erratics belonging to the Rickard Hill facies (RHF) of the Saugerties Member of the Schoharie Formation (upper Emsian: Lower Devonian) occur scattered throughout the Piedmont of northern New Jersey and Lower Hudson Valley of New York. These RHF glacial erratics contain an assemblage of trilobites belonging to: Anchiopella anchiops, Burtonops cristatus, Calymene platys, Terataspis grandis, cf. Trypaulites sp. and cf. Coniproetus sp. This RHF glacial erratic trilobite assemblage consists predominately of disarticulated cephala and pygidia that were originally preserved as part of a localized, third-order eustatic sea level lag deposit in the Helderberg Mountains region of central New York State and subsequently transported in glacially plucked blocks by the Hudson-Champlain Lobe of the Laurentide Ice Sheet southward into New Jersey. Physical and chemical weathering during glacial erosion, transportation and deposition of the RHF glacial erratics has revealed some anatomical features of these trilobites in high detail along with other invertebrates. This unique sequence of weathering reveals additional characteristics that bear upon issues of bathymetric controls on upper Schoharie Formation lithology, trilobite faunal abundance and taphonomy during the upper Emsian (Lower Devonian) of eastern New York State.

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Jamoytius-like vertebrates from the Lower Devonian Manlius Formation of New York State

Journal of Vertebrate Paleontology ◽

10.1080/02724634.1984.10012025 ◽

1984 ◽

Vol 4 (4) ◽

pp. 501-506 ◽

Cited By ~ 5

Author(s):

Philippe Janvier ◽

Richard M. Busch

Keyword(s):

New York ◽

Lower Devonian ◽

New York State ◽

York State ◽

Manlius Formation

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Paleomagnetism of the Upper Silurian and Lower Devonian carbonates of New York State: evidence for secondary magnetizations residing in magnetite

Physics of The Earth and Planetary Interiors ◽

10.1016/0031-9201(82)90048-6 ◽

1982 ◽

Vol 30 (4) ◽

pp. 385-395 ◽

Cited By ~ 52

Author(s):

Christopher R. Scotese ◽

Rob Van der Voo ◽

Chad McCabe

Keyword(s):

New York ◽

Lower Devonian ◽

New York State ◽

York State ◽

Upper Silurian

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The Silurian-Devonian fossil record of the Myriapoda

Philosophical Transactions of the Royal Society of London Series B Biological Sciences ◽

10.1098/rstb.1985.0082 ◽

1985 ◽

Vol 309 (1138) ◽

pp. 227-237 ◽

Cited By ~ 52

Keyword(s):

New York ◽

Fossil Record ◽

Discrete Group ◽

Lower Devonian ◽

New York State ◽

Upper Devonian ◽

York State ◽

Red Sandstone ◽

Terrestrial Invertebrates ◽

Terrestrial Invertebrate

The oldest recorded terrestrial invertebrates are various small Diplopods (millepedes) from the Lower Old Red Sandstone of Britain which were probably preserved preferentially due to their robust calcified exoskeleton. While the myriapod affinities and terrestrial habits of the earliest, pre-Prídolí, claims are highly questionable, true diplopods are known from the latest Silurian (Stonehaven Group) and Lower Devonian of Scotland. In addition, a variety of enigmatic myriapod-like arthropods occur sporadically in the late Silurian-Lower Devonian freshwater facies of the M idland Valley of Scotland and Welsh Borderlands. Among these, the kampecarids ss. constitute a discrete group of short-bodied, diplopodous uniramian arthropods, possibly with myriapod affinities and aquatic habits. In contrast to the diversity of chelicerate groups represented in the later terrestrial invertebrate faunas of Rhynie, Aiken and Gilboa, the Middle to Upper Devonian fossil record of the Myriapoda is very sparse. While true diplopods are notably absent, a variety of fragmentary chilopods (centipedes) are now known from the Gilboa Fauna (Givetian) of New York State.

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