Notes on the distribution of Pennsylvania plants : based on specimens in the Carnegie Museum of Natural History herbarium

Thompson, Sandra A.; Buker, W. E.; Macdonald, Myrta

doi:10.5962/bhl.title.123712

Special Publication

1989

DOI: 10.5962/bhl.title.123712

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Notes on the distribution of Pennsylvania plants : based on specimens in the Carnegie Museum of Natural History herbarium

Sandra A. Thompson¹,

W. E. Buker²,

Myrta Macdonald³

Abstract: Carex annectens (Bickn.) Bickn. -BEAVER. Raccoon Creek [Bright (18363)].Carex arctata Boott -FAYETTE: Ohiopyle [Shafer & Kinzer (18422)]. Carex baileyiBritt. -CRAWFORD: Townville [Leberman (269059)]. Carex bebbii (Bailey) Olney -LAWRENCE: Plain Grove [Thomas 2965]. Carex bromoides Willd. -BUTLER: Jennings Prairie [Vogler 7-41], ERIE: Edinboro [Jennings & Fettennan (18669)]. Carex brunnescens (Pers.) Poir. -BUTLER: Jennings Prairie [Vogler 7-60], CRAWFORD: Linesville [Joinings (18708)]; also Meadville. Carex … Show more

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“…The authors of this volume are to be congratulated for updating and expanding the 1979 Atlas of the Flora of Pennsylvania (Wherry et al, 1979). Although this 1979 work had served as the classic reference for the flora of the commonwealth, several publications during the past few years demonstrated that many specimen records had been overlooked by Wherry and his colleagues and that there were numerous recent collections which expanded our knowledge of the Pennsylvania flora (e.g., Thompson et al, 1989). This new atlas is based on data accumulated for the original atlas and recorded on index cards housed in the Morris Arboretum, plus additional specimen label information from eleven herbaria (including Carnegie Museum of Natural History) and several private collections.…”

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confidence: 99%

The Vascular Flora of Pennsylvania: Annotated Checklist and Atlas. Ann F. Rhoads and William M. Klein, Jr. [Review]

Chuey¹

1995

Annals of the Carnegie Museum

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mentioning

confidence: 99%

The Vascular Flora of Pennsylvania: Annotated Checklist and Atlas. Ann F. Rhoads and William M. Klein, Jr. [Review]

Chuey¹

1995

Annals of the Carnegie Museum

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Geological setting of high-temperature hydrothermal activity and massive sulphide formation on fast- and slow-spreading ridges

Krasnov¹,

Poroshina²,

Cherkashev³

1995

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Geological features which control massive sulphide formation on the fast-spreading East Pacific Rise (EPR) and slow-spreading Mid-Atlantic Ridge (MAR) can be specified based on data from the Sevmorgeologija Association (St Petersburg) research cruises and results of other studies. Wide crestal surfaces of undisturbed axial volcanoes and the presence of axial grabens that indicate voluminous subsurface magma chambers represent the sites most favourable for sulphide formation on the EPR. The elevation of rift segments and distance from major ridge-axis discontinuities are less important for sulphide formation. Sites of localized magma delivery from subcrustal zones, as indicated by Mg anomalies in basalts, may be favourable. However, at least one site near 21°30′S on the EPR shows evidence of along-axial magma penetration from the central part of the rift segment to its tip, resulting in a lateral shift of hydrothermal activity with time. Higher crustal permeability for magma is required for the formation of subsurface chambers which initiate hydrothermal convection on the magmatically less active MAR. Rift valley marginal faults, and especially their intersections with minor transverse dislocations, locally control hydrothermal activity where magma laterally penetrates from the extrusive zones of the adjacent rift segments.

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Geodynamic significance of the Cretaceous pillow basalts from North Anatolian Ophiolitic Mélange Belt (Central Anatolia, Turkey): geochemical and paleontological constraints

Rojay¹,

Altıner

Altiner

et al. 2004

Geodinamica Acta

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The most widespread blocks within the Cretaceous ophiolitic mélange (North Anatolian ophiolitic mélange) in Central Anatolia (Turkey) are pillow basalts, radiolarites, other ophiolitic fragments and Jurassic-Cretaceous carbonate blocks. The pillow basalts crop out as discrete blocks in close relation to radiolarites and ophiolitic units in Cretaceous ophiolitic mélange. The geochemical results suggest that analyzed pillow basalts are within-plate ocean island alkali basalts. The enrichment of incompatible elements (Nb, Ta, Light REE, Th, U, Cs, Rb, Ba, K) demonstrates the ocean island environment (both tholeiites and alkali basalts) and enriched MORB. Dated calcareous intrafills and biodetrital carbonates reveal an age span of Callovian-Early Aptian. The thin-shelled protoglobigerinids, belonging to the genus Globuligerina, in the calcareous intrafills between pillow basalt lobes indicates a Callovian-Barremian age interval, most probably, Valanginian to Late Barremian. The volcanic and radiolarite detritus-bearing orbitolinid-Baccinella biodetrital carbonates dated as Late Barremian-Early Aptian in age, were probably deposited around atolls and have a close relationship with the ocean island pillow basalts. The results collectively support the presence of a seamount on the Neo-Tethyan oceanic crust during the Valanginian-Late Barremian and atolls during the Late Barremian-Early Aptian interval. The presence of an oceanic crust older than that seamount along the Northern Branch of Neo-Tethys is conformable with the geodynamic evolution of the Tethys.

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Notes on the distribution of Pennsylvania plants : based on specimens in the Carnegie Museum of Natural History herbarium

Cited by 3 publications

References 0 publications

The Vascular Flora of Pennsylvania: Annotated Checklist and Atlas. Ann F. Rhoads and William M. Klein, Jr. [Review]

The Vascular Flora of Pennsylvania: Annotated Checklist and Atlas. Ann F. Rhoads and William M. Klein, Jr. [Review]

Geological setting of high-temperature hydrothermal activity and massive sulphide formation on fast- and slow-spreading ridges

Geodynamic significance of the Cretaceous pillow basalts from North Anatolian Ophiolitic Mélange Belt (Central Anatolia, Turkey): geochemical and paleontological constraints

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