The Silvics of Persea borbonia (L.) Spreng., Red Bay, and Persea palustris (Raf.) Sarg., Swamp Bay, Lauraceae (Laurel Family)

2021 ◽  
Author(s):  
Timothy M. Shearman ◽  
G. Geoff Wang ◽  
Albert E. Mayfield
Keyword(s):  
Persea Borbonia ◽  
Red Bay

Raffaelea lauricola. [Distribution map].

2015 ◽  
Author(s):  
Keyword(s):  
North Carolina ◽  
South Carolina ◽  
North America ◽  
Geographical Distribution ◽  
Distribution Map ◽  
Raffaelea Lauricola ◽  
Persea Borbonia ◽  
New Distribution

Abstract A new distribution map is provided for Raffaelea lauricola Harrington, Fraedrich & Aghayeva. Sordariomycetes: Ophiostomatales: Ophiostomataceae. Hosts: Redbay (Persea borbonia), swampbay (P. palustris), avocado (P. americana) and other members of the Lauraceae. Information is given on the geographical distribution in Asia (Japan, Kyushu and Taiwan) and North America (USA, Alabama, Florida, Georgia, Mississippi, North Carolina and South Carolina).

scholarly journals Comment on “Genetic analysis of 16th-century whale bones prompts a revision of the impact of Basque whaling on right and bowhead whales in the western North Atlantic”

2006 ◽  
Vol 84 (7) ◽  
pp. 1059-1065 ◽  
Author(s):  
Aldemaro Romero ◽  
Shelly Kannada
Keyword(s):  
Genetic Analysis ◽  
North Atlantic ◽  
Small Sample ◽  
Bowhead Whale ◽  
16Th Century ◽  
Bowhead Whales ◽  
The North ◽  
The North Atlantic ◽  
Red Bay ◽  
The Impact

Rastogi et al. presented their genetic analysis of 16th-century whale bones found on a Basque whaling ship excavated from Red Bay, Labrador Peninsula, Canada. Based on the results from a very small sample, these authors concluded that whaling populations were already depleted before the onset of whaling. This is in direct contradiction to historical data. They also implied that the Basques were the only Europeans whaling in the North Atlantic before the onset of Yankee whaling and that there was a belief that Basque whalers historically killed equal numbers of right and bowhead whales. Here we present data based on historical and archaeological records generated by several authors using different methodologies, which clearly show that (i) Basques were not the only whalers that impacted cetacean populations in the North Atlantic; (ii) the number of whales killed by different peoples for approximately two centuries indicates that both right and bowhead whale population levels were much higher than typically assumed; and (iii) for many years there have been records published indicating that the Basques and others killed more bowhead whales than right whales, at least in the western North Atlantic.

The timing of Proterozoic magmatism in the Pinware terrane of southeast Labrador, easternmost Quebec and northwest Newfoundland

2004 ◽  
Vol 41 (2) ◽  
pp. 127-150 ◽  
Author(s):  
L M Heaman ◽  
C F Gower ◽  
S Perreault
Keyword(s):  
Long Range ◽  
Alkali Feldspar ◽  
Geochronological Data ◽  
Grenville Province ◽  
Mafic Magmatism ◽  
Granitoid Rocks ◽  
Red Bay ◽  
High Level ◽  
First Time ◽  
Magmatic Event

The Pinware terrane is located in the easternmost Grenville Province and contains crust of Labradorian (1710–1600 Ma), Pinwarian (1520–1460 Ma), Elsonian (1460–1230 Ma), Grenvillian (1080–985 Ma), and late- to post-Grenvillian (985–955 Ma) age. Newly obtained U–Pb geochronological data enhance understanding of all these evolutionary stages. A Labradorian age of 1632 ± 8 Ma has been obtained for the Brador River granite, thereby establishing the presence of mid- to late- Labradorian rocks in the southernmost part of the region. A maximum age of ~1600 Ma obtained for the Ten Mile Lake granite indicates for the first time that Labradorian crust could continue into the northern Long Range Inlier of western Newfoundland. Pinwarian activity is indicated by ages of ~1526–1504, 1500 ± 14, 1467 ± 44, and 1466 ± 8 Ma from granitoid rocks at Rivière St-Paul, West St. Modeste, Diable Bay, and Pinware, respectively. The first evidence for late Elsonian mafic magmatism in this region is provided by a concordant baddeleyite date of 1248 ± 5 Ma from gabbronorite at Lourdes-de-Blanc-Sablon. This study has also identified an early post-tectonic, high-level, mafic–anorthositic–syenitic magmatic event between 985 and 975 Ma. Recognition of the event relies on previous results and newly obtained ages of 979.5 ± 2.8 Ma from the Red Bay gabbro, 974.5 ± 1.8 Ma from the Vieux Fort anorthosite, and 969 ± 11 Ma from the Lower Pinware River alkali-feldspar syenite. Time, composition, and fabric criteria distinguish these rocks from late-post-tectonic monzonite, syenite and granite emplaced between 966 and 956 Ma.

Provenance and tectonic implications of Palaeoproterozoic (c. 1740 Ma) quartz porphyry clasts in the basal Old Red Sandstone (Lilljeborgfjellet Conglomerate Formation) of northwestern Svalbard's Caledonides

1998 ◽  
Vol 135 (6) ◽  
pp. 755-768 ◽  
Author(s):  
F. J. HELLMAN ◽  
D. G. GEE ◽  
T. GJELSVIK ◽  
A. M. TEBENKOV
Keyword(s):  
Amphibolite Facies ◽  
Granitic Rocks ◽  
Maximum Diameter ◽  
Northwestern Part ◽  
High Grade ◽  
Quartz Porphyry ◽  
Red Sandstone ◽  
Facies Metamorphism ◽  
Single Zircon ◽  
Red Bay

The Lilljeborgfjellet Conglomerate Formation composes the lower part of the alluvial Siktefjellet Group of northwestern Spitsbergen's Old Red Sandstone succession. Siktefjellet strata are of late Silurian or early Devonian age, but lack precise age-diagnostic fossils. They are unconformably overlain by conglomerates and sandstones of the Red Bay Group, which contain a well established fish fauna of Lochkovian age. The Lilljeborgfjellet Conglomerate rests with a major unconformity on high-grade (with eclogites) schists and gneisses, with associated corona gabbros and granitic gneisses. Previous isotope-age studies have shown that these igneous rocks yield U/Pb ages of c. 950 Ma, and that the eclogite facies metamorphism may be of Caledonian or late Neoproterozoic age. The high P/high T rocks are intercalated with and overlain by schists affected only by Caledonian amphibolite facies metamorphism, recorded by 40Ar/39Ar and Rb/Sr cooling ages of 400–430 Ma.In the Lochkovian Red Bay Group of the Raudfjorden Graben, two horizons of tuffites occur, interbedded with sandstones. New studies of eight zircons from these volcanic rocks have provided single-zircon lead-evaporation ages of c. 950 and c. 1350 Ma; one yielded 440 Ma. All these zircons are probably derived from the underlying basement rocks, the ages being significantly older than the Devonian host strata (c. 410 Ma).The clasts in the Lilljeborgfjellet Conglomerate are generally angular to subrounded and derived locally from the underlying high-grade metamorphic complex. A subordinate (usually less than 1%, but up to about 10%) component of the clasts is a quartz porphyry that is not known in the exposed bedrock anywhere in northwestern Spitsbergen. The quartz porphyries are better rounded than the other clasts; however, the maximum diameter reaches 1.5 metres, indicating that transport distances are unlikely to have exceeded a few kilometres. Three quartz porphyry boulders have been dated by the single-zircon lead-evaporation method and shown to be of Palaeoproterozoic age, yielding ages of 1735±4, 1736±5 and 1739±5 Ma that have not previously been detected in the northwestern part of Svalbard's Caledonides.The quartz porphyry clasts show no evidence of the widespread high-grade tectonothermal activity of Mesoproterozoic and early Palaeozoic age that influenced northwestern Spitsbergen. It is therefore concluded that the most probable source of these clasts lies to the east in the unexposed basement beneath the Old Red Sandstones of the Andrèeland–Dicksonland Graben. The Lilljeborgfjellet quartz porphyry clasts are closely similar in age to the granitic rocks of Ny Friesland. Whereas the latter were subject to Caledonian high amphibolite facies metamorphism, the quartz porphyry clasts have only been affected by a low greenschist facies overprint. Nevertheless, the similarity in age suggests an affinity to Ny Friesland and it is proposed here that the Breibogen–Bockfjorden Fault defines the most important boundary between Svalbard's Caledonian terranes.

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