The stratigraphy and biofacies trends of the Lower Mesozoic Gabbs and Sunrise formations, west-central Nevada

1983 ◽  
Vol 20 (10) ◽  
pp. 1598-1608 ◽  
Author(s):  
David G. Taylor ◽  
Paul L. Smith ◽  
Richard A. Laws ◽  
Jean Guex
Keyword(s):  
New York ◽  
Benthic Communities ◽  
Habitat Diversity ◽  
Polar Regions ◽  
System Boundary ◽  
Western Cordillera ◽  
Early Mesozoic ◽  
West Central ◽  
Lithostratigraphic Units ◽  
Early Late

The boundary between the Gabbs and Sunrise formations of west-central Nevada is redefined and the two units are combined to form the new Volcano Peak Group. The Nun Mine, Mount Hyatt, and Muller Canyon members are named and assigned to the Gabbs Formation, and six new lithostratigraphic units for the Sunrise Formation are the Ferguson Hill, Five Card Draw, New York Canyon, Joker Peak, and Mina Peak members. The boundary for the Triassic and Jurassic systems is placed above the last Choristoceras and below the first certain Psiloceras. The section at Ferguson Hill is proposed as the system boundary stratotype. The transgressive–regressive curve for the formations points to a strong tectonic influence, but the late Norian and late Hettangian regressions and early Sinemurian, early Pliensbachian, and early late Pliensbachian transgressions are consistent with inferred eustatic events. The facies and faunal data are consistent with an early Mesozoic record in the western Cordillera suggesting widespread anoxia. The high within-habitat diversity in Neogene offshore benthic communities compared with those in the Mesozoic may correspond to the breakdown of widespread marine anoxic conditions as polar regions cooled and worldwide climatic zonation intensified.

Book Reviews

Transfers ◽  
2016 ◽  
Vol 6 (3) ◽  
pp. 146-166
Author(s):  
Johannes Görbert ◽  
Russ Pottle ◽  
Jeff Morrison ◽  
Pramod K. Nayar ◽  
Dirk Göttsche ◽  
...  
Keyword(s):  
New York ◽  
Travel Writing ◽  
Travel Narratives ◽  
Jim Crow ◽  
Cultural Work ◽  
Polar Regions ◽  
Alexander Von Humboldt ◽  
Literary Forms ◽  
Review Finding ◽  
University Of Massachusetts

German Literary Anthropology: Across Cultures, Across Genres Stefan Hermes and Sebastian Kaufmann, eds., Der ganze Mensch – die ganze Menschheit: Völkerkundliche Anthropologie, Literatur und Ästhetik um 1800 (Berlin: de Gruyter, 2014), 318 pp., 10 illustrations, €89.95What’s Old Is New Again, Mostly Julia Kuehn and Paul Smethurst, eds., New Directions in Travel Writing Studies (New York: Palgrave Macmillan, 2015), 325 pp., $90Complex Journeys around the World and through Literary and Intellectual Traditions around 1800 Johannes Görbert, Die Vertextung der Welt: Forschungsreisen als Literatur bei Georg Forster, Alexander von Humboldt und Adelbert von Chamisso. Weltliteraturen/World Literatures, Schriftenreihe der Friedrich Schlegel Graduiertenschule für literaturwissenschaftliche Studien, vol. 7 (Berlin: de Gruyter, 2014), vi, 426 pp., 8 illustrations, €109.95Travel as Cultural Work Gary Totten, African American Travel Narratives from Abroad: Mobility and Cultural Work in the Age of Jim Crow (Amherst: University of Massachusetts Press, 2015), 170 pp., $26.95Colonial Encounters between Africa and Europe—with Special Reference to Austria and Switzerland Manuel Menrath, ed., Afrika im Blick: Afrikabilder im deutschsprachigen Europa, 1870–1970 (Zurich: Chronos, 2012), 329 pp., €43Social Formations and Literary Forms in Long Nineteenth-Century Travel Writing Mary Henes and Brian H. Murray, eds., Travel Writing, Visual Culture and Form, 1760–1900 (London: Palgrave Macmillan, 2016), 248 pp., 21 illustrations, $95Travel Accounts of Polar Regions and Colonial Discourse Mike Frömel, Off ene Räume und gefährliche Reisen im Eis: Reisebeschreibungen über die Polarregionen und ein kolonialer Diskurs im 18. und frühen 19. Jahrhundert (Hannover: Wehrhahn, 2013), 288 pp., €29.50.“Imagined Geographies” and the Navigation of British European Identity Katarina Gephardt, Th e Idea of Europe in British Travel Narratives, 1789–1914 (Burlington, VT: Ashgate, 2014), 248 pp., 15 illustrations, $104.95Terminal and Threshold: Experiencing the Airport Christopher Schaberg, Th e End of Airports (London: Bloomsbury Academic, 2015), 216 pp., 25 illustrations, £13.99NOVEL REVIEW Finding Purity Jonathan Franzen, Purity (New York: Farrar, Straus and Giroux, 2015), 563 pp., $28

The Genesee Connection: The Origins of Iroquois Culture in West-Central New York

1986 ◽  
Vol 7 (1) ◽  
pp. 15-44
Author(s):  
Mary Ann Palmer Niemczycki
Keyword(s):  
New York ◽  
Diagnostic Criteria ◽  
Current Concept ◽  
The West ◽  
Diagnostic Significance ◽  
West Central ◽  
Central New York

The Genesee Valley has long been recognized as a center of Iroquois development, but the connection between Owasco sites in the Genesee and Iroquois sequences in the adjacent regions has never been adequately demonstrated. Attempts to identify transitional Owasco-Iroquois sites in this region have been hampered by the use of diagnostic criteria based on data from eastern New York. This article examines ceramic patterns in the Genesee and establishes a regional cultural sequence based on ceramic criteria which have local diagnostic significance. This sequence reveals the transition from Owasco to Iroquois culture begins in the Genesee with a sudden influx of Ontario Iroquois ceramic traits from the west ca. 1250 A.D. This Owasco-Ontario Iroquois connection in the Genesee negates certain assumptions regarding Iroquois origins and alters our current concept of in situ development.

scholarly journals Reconstruction of the enigmatic Late Cambrian Climactichnites

1992 ◽  
Vol 6 ◽  
pp. 321-321 ◽  
Author(s):  
E.L. Yochelson ◽  
M. Parrish
Keyword(s):  
New York ◽  
Cross Section ◽  
Individual Variation ◽  
Short Distance ◽  
Loose Sand ◽  
Desiccation Cracks ◽  
Late Cambrian ◽  
Anterior Flap ◽  
Considerable Individual Variation ◽  
Early Late

Climactichnites Logan, 1860, is known only from its large trail up to 20 cm in width, a trace superficially resembling a rope ladder. Prominent lateral ridges are parallel throughout the length of the trail; they may be smooth and hemispherical in cross-section or crenulated, much like a pie crust. Between these ridges is a series of raised dune-like bars and furrows dug into the substrate. The bars and furrows show considerable individual variation between trails and also variation along a trail. Ovoid impressions are known which occur at the start of trails. The posterior of these impressions is well rounded; the anterior is triangular, and for a short distance from the impression, the trail is developed on only one side. One exceptionally preserved impression shows curved, closely spaced, fine lines parallel to the posterior.The trails are found only in sandstone, and where they are present, they are abundant. Slightly equivocable evidence indicates a Dresbachian (early Late Cambrian) age for the occurrences in New York, Missouri, and Wisconsin; trails in Ontario and Quebec are less certainly dated. Desiccation cracks and air escape hole suggest that the trail was fully exposed to the atmosphere.From this data, a large number of sketches were made to reconstruct an animal able to make such a trail. Each attempt produced new speculation on the morphology. In the final rendition, the animal is bilaterally symmetrical, broad and low. The integument is tough, and the sole bears a subcentral mouth anteriorward. Lateral flaps scraped and compressed damp sand to make the parallel ridges. The anterior was strongly musculated and thin. This anterior flap grasped the sediment, alternating on either side of the animal to pull the form forward when the lateral flaps were relaxed. Curved rows of cilia on the posterior moved loose sand into dunes between the furrows formed by the anterior flaps.This reconstruction is like that of no other animal known in the Vendian or the Phanerozoic.

scholarly journals Diversity patterns and palaeoecology of benthic communities of the Kanosh Formation (Pogonip Group, Utah, western USA)

2020 ◽  
Vol 100 (4) ◽  
pp. 993-1006
Author(s):  
Richard Hofmann ◽  
Jan Philipp Kehl
Keyword(s):  
Great Basin ◽  
Benthic Communities ◽  
Habitat Diversity ◽  
Shelf Zone ◽  
Base Line ◽  
Benthic Assemblages ◽  
Diversity Patterns ◽  
Fine Grained ◽  
Type Area ◽  
Western Us

AbstractThe Dapingian to Darriwilian Kanosh Formation is one of the most fossiliferous units of the Pogonip Group (Great Basin, western US). It records a critical phase of the so-called Great Ordovician Biodiversification Event (GOBE) during which many marine clades diversified on lower systematic levels. However, a comprehensive palaeoecological analysis has not been presented for this unit so far. Based on newly collected material from three sections in the type area at Ibex, we reconstruct benthic marine communities, analyse diversity patterns, and discuss its significance for the GOBE. We find no differences in species’ composition across the formation with respect to brachiopods. Benthic assemblages are dominated by Shoshonorthis michaelis, alongside the presence of Anomalorthis lonensis and Anomalorthis utahensis across the whole unit. Trilobites show a more pronounced facies restriction with species of Kanoshia and Pseudomera being observed in more proximal limestone whereas Bathyurellus and Pseudoolenoides occur in fine-grained, low-energy deposits. The skeletal limestone also records abundant bioclasts of bryozoans, echinoderms, and receptaculitids, suggesting an ecologically diverse and tiered community being present in the inner shelf zone. However, most of these groups are not particularly diverse in terms of species richness. This implies that principle establishment of typical members of the “Palaeozoic Fauna” is not associated with a local diversification of clades. The comparably low habitat diversity of the Kanosh Fauna likely reflects environmental constraints such as high rates of siliclastic input. Additionally, these mainly Dapingian communities still represent a base-line fauna before the principal diversification took place.

Tribes Hill–Rochdale formations in east Laurentia: proxies for Early Ordovician (Tremadocian) eustasy on a tropical passive margin (New York and west Vermont)

2011 ◽  
Vol 149 (1) ◽  
pp. 93-123 ◽  
Author(s):  
ED LANDING ◽  
JONATHAN M. ADRAIN ◽  
STEPHEN R. WESTROP ◽  
BJÖRN KRÖGER
Keyword(s):  
New York ◽  
Sea Level ◽  
Continental Slope ◽  
Appalachian Mountains ◽  
Passive Margin ◽  
Depositional Sequence ◽  
Early Ordovician ◽  
Layer Cake ◽  
Low Diversity ◽  
Early Late

AbstractSlow subsidence and tectonic quiescence along the New York Promontory margin of Laurentia mean that the carbonate-dominated Tribes Hill and overlying Rochdale formations serve as proxies for the magnitude and timing of Tremadocian eustatic changes. Both formations are unconformity-bound, deepening–shoaling, depositional sequences that double in thickness from the craton into the parautochthonous, western Appalachian Mountains. A consistent, ‘layer cake’ succession of member-level units of the formations persists through this region. The Tribes Hill Formation (late early Tremadocian, late Skullrockian, late Fauna B–Rossodus manitouensis Chron) unconformably overlies the terminal Cambrian Little Falls Formation as the lowest Ordovician unit on the New York Promontory. It was deposited during the strong early Tremadocian, or Stonehenge, transgression that inundated Laurentia, brought dysoxic/anoxic (d/a) slope water onto the shelf and led to deposition of the Schaghticoke d/a interval (black mudstone and ‘ribbon limestone’) on the Laurentian continental slope. The uniform lithofacies succession of the Tribes Hill includes a lower sand-rich member; a middle, dark grey to black mudstone that records d/a in eastern exposures; and an upper, shoaling-up carbonate highstand facies. A widespread (12000+ km2) thrombolitic interval in the highstand carbonate suggests the New York Promontory was rimmed by thrombolites during deposition of the Tribes Hill. Offlap and erosion of the Tribes Hill was followed by the relatively feeble sea-level rise of the Rochdale transgression (new) in Laurentia, and deposition of the Rochdale Formation. The Rochdale transgression, correlated with the Kierograptus Drowning Interval in Baltica, marks a eustatic rise. The Rochdale Formation represents a short Early Ordovician interval (early late Tremadocian, middle–late Stairsian, Macerodus dianae Chron). It correlates with a depositional sequence that forms the middle Boat Harbour Formation in west Newfoundland and with the Rte 299 d/a interval on the east Laurentian slope. The Rochdale has a lower carbonate with abundant quartz silt (Comstock Member, new) and an upper, thrombolitic (Hawk Member, new) high-stand facies. Tribes Hill and Rochdale faunas are mollusc-rich, generally trilobite-poor, and have low diversity, Laurentian faunal province conodonts. Ulrichodina rutnika Landing n. sp. is rare in Rochdale conodont assemblages. Trilobites are also low in diversity, but locally form coquinas in the middle Tribes Hill. The poorly preserved Rochdale trilobites include the bathyurid Randaynia, at least two hystricurid species and Leiostegium.

Middle Jurassic corals from the Wallowa terrane, west-central Idaho

1990 ◽  
Vol 64 (3) ◽  
pp. 352-362 ◽  
Author(s):  
George D. Stanley ◽  
Louise Beauvais
Keyword(s):  
North American ◽  
Middle Jurassic ◽  
The North ◽  
Western Cordillera ◽  
West Central ◽  
Wallowa Terrane ◽  
North American Craton ◽  
Central Idaho

New colonial corals from near Pittsburg Landing, Idaho, are clearly dated as Middle Jurassic (Bajocian) in age. They consist of Coenastraea hyatti (Wells) and Thecomeandra vallieri n. sp., and occur abundantly with molluscan fossils in thin, biostromal limestone beds in the Coon Hollow Formation. These fossils are the youngest shelly faunas yet known from the Wallowa terrane. The similarity of the coral and bivalve fauna to endemic faunas of the Western Interior suggests that during Middle Jurassic time, the Wallowa terrane was close enough to the North American craton for faunal exchange with the Western Interior Embayment. The Pittsburg Landing corals appear dissimilar from Middle Jurassic corals known from other terranes of the western Cordillera.

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