scholarly journals Age and tectonic setting of the Quinebaug- Marlboro belt and implications for the history of Ganderian crustal fragments in southeastern New England, USA

Geosphere ◽  
2021 ◽  
Author(s):  
Gregory J. Walsh ◽  
John N. Aleinikoff ◽  
Robert A. Ayuso ◽  
Robert P. Wintsch
Keyword(s):  
New England ◽  
Tectonic Setting ◽  
Detrital Zircons ◽  
Spatial History ◽  
Plate Reconstructions ◽  
Minimum Age ◽  
History Of ◽  
Mariana Arc ◽  
Maritime Canada ◽  
First Time

Crustal fragments underlain by high-grade rocks represent a challenge to plate reconstructions, and integrated mapping, geochronology, and geochemistry enable the unravelling of the temporal and spatial history of exotic crustal blocks. The Quinebaug-Marlboro belt (QMB) is an enigmatic fragment on the trailing edge of the peri-Gondwanan Ganderian margin of southeastern New England. SHRIMP U-Pb geochronology and geochemistry indicate the presence of Ediacaran to Cambrian metamorphosed volcanic and intrusive rocks dated for the first time between ca. 540–500 Ma. The entire belt may preserve a cryptic, internal stratigraphy that is truncated by subsequent faulting. Detrital zircons from metapelite in the overlying Nashoba and Tatnic Hill Formations indicate deposition between ca. 485–435 Ma, with provenance from the underlying QMB or Ganderian crust. The Preston Gabbro (418 ± 3 Ma) provides a minimum age for the QMB. Mafic rocks are tholeiitic with trace elements that resemble arc and E-MORB sources, and samples with negative Nb-Ta anomalies are similar to arc-like rocks, but others show no negative Nb-Ta anomaly and are similar to rocks from E-MORB to OIB or backarc settings. Geochemistry points to a mixture of sources that include both mantle and continental crust. Metamorphic zircon, monazite, and titanite ages range from 400 to 305 Ma and intrusion of granitoids and migmatization occurred between 410 and 325 Ma. Age and chemistry support correlations with the Ellsworth terrane in Maine and the Penobscot arc and backarc system in Maritime Canada. The arc-rifting zone where the Mariana arc and the Mariana backarc basin converge is a possible modern analog.

Grenvillian provenance for the amphibolite-grade Trap Falls Formation: implications for early Paleozoic tectonic history of New England

1997 ◽  
Vol 34 (9) ◽  
pp. 1286-1294 ◽  
Author(s):  
D. K. McDaniel ◽  
G. N. Hanson ◽  
S. M. McLennan ◽  
J. H. Sevigny
Keyword(s):  
New England ◽  
Detrital Zircons ◽  
Tectonic History ◽  
Chemical Index ◽  
Depleted Mantle ◽  
Isotopic Analyses ◽  
History Of ◽  
Chemical Index Of Alteration ◽  
Depositional Age ◽  
Ree Patterns

The Trap Falls Formation is a sequence of interlayered quartzites and schists that crops out in the Appalachian belt in southern Connecticut, and was deformed and metamorphosed to middle amphibolite grade during Acadian orogenesis. Schists have high Al2O3 and low CaO, Na2O, and K2O (chemical index of alteration CIA = 68–70), consistent with a significant weathering history in the sediment source. Rare earth element (REE) patterns for both schists and quartzites parallel post-Archean average Australian Shale, with light REE enrichment and well-developed Eu anomalies, suggesting an average upper crustal source. Whole-rock Nd and Pb isotopic analyses indicate old sources, with depleted mantle model ages (TDM) from 1880 to 1660 Ma, 207Pb/204Pb from 15.62 to 15.87, and 206Pb/204Pb from 19.11 to 22.08. U–Pb ages for single-grain and multigrain populations of detrital zircons range between 1113 and 992 Ma, the youngest of which defines a maximum depositional age for the Trap Falls Formation. U–Pb zircon ages indicate a late Grenvillian source for the zircons. Nd and Pb isotopic compositions are consistent with a source that is dominated by Grenville-age rocks with some component of older crust. Combining all of the data, we interpret that the protolith of the Trap Falls Formation was comprised of aluminous muds interbedded with clean quartz arenites, and suggest that they were deposited on the stable, trailing-edge margin of North America sometime during the Late Proterozoic to the Early Cambrian. The sediments were derived from a weathered source with an upper continental crust composition. Isotopic data and zircon ages indicate that this source was dominated by Grenville-age rocks.

scholarly journals Supplemental Material: Age and tectonic setting of the Quinebaug-Marlboro belt and implications for the history of Ganderian crustal fragments in Southeastern New England, USA

2021 ◽  
Author(s):  
G.J. Walsh ◽  
et al.
Keyword(s):  
New England ◽  
Tectonic Setting ◽  
Google Earth ◽  
History Of

<div>Google Earth KMZ file (File S1) of sample locations from Table 5 and map showing sample locations from Figure 2 (File S2). <br></div><div><br></div><div><br></div><div><br></div><div><br></div>

scholarly journals Supplemental Material: Age and tectonic setting of the Quinebaug-Marlboro belt and implications for the history of Ganderian crustal fragments in Southeastern New England, USA

2021 ◽  
Author(s):  
G.J. Walsh ◽  
et al.
Keyword(s):  
New England ◽  
Tectonic Setting ◽  
Google Earth ◽  
History Of

<div>Google Earth KMZ file (File S1) of sample locations from Table 5 and map showing sample locations from Figure 2 (File S2). <br></div><div><br></div><div><br></div><div><br></div><div><br></div>

U–Pb geochronology of the eastern Abitibi Subprovince. Part 2: Noranda – Kirkland Lake area

1993 ◽  
Vol 30 (1) ◽  
pp. 29-41 ◽  
Author(s):  
J. K. Mortensen
Keyword(s):  
Tectonic Setting ◽  
Volcanic Rocks ◽  
Rapid Onset ◽  
Detrital Zircons ◽  
Lake Area ◽  
Sedimentary Sequences ◽  
South Central ◽  
Abitibi Subprovince ◽  
History Of ◽  
Main Period

U–Pb zircon ages for 15 volcanic and plutonic units in the Noranda and Kirkland Lake areas help constrain the history of volcanism, plutonism, sedimentation, and deformation in the south-central part of the Abitibi belt. Volcanism occurred over an interval of at least 50 Ma, beginning with the deposition of the volcanic and volcaniclastic units within the Pacaud Structural Complex at 2747 Ma. Following a period of apparent quiescence, magmatism resumed at 2730–2725 Ma with the eruption of volcanic rocks in the Normétal and Lac Abitibi area. From 2715 until about 2698 Ma, volcanism occurred sporadically throughout much of the area, culminating in the eruption of the Blake River Group from 2703 to 2698 Ma. Several large intrusive bodies yield ages that indicate that they are plutonic equivalents of the Blake River Group. Plutons that are considered to have been emplaced during the Kenoran orogeny give ages that are only slightly younger than the youngest volcanic units of the Blake River Group, emphasizing the very rapid onset of Kenoran deformation following the cessation of volcanic activity.The Cléricy syenite, dated at 2682 ± 3 Ma, postdates the main period of Kenoran deformation in this area and intrudes sedimentary rocks of the Kewagama Group which contain detrital zircons as young as 2687 Ma. These data suggest that the Kewagama Group is the same age as late sedimentary sequences such as the Timiskaming Group and may have been deposited in a similar tectonic setting.

Adam Zalužanský’s “De sexu plantarum” (1592): an early pioneering chapter on plant sexuality

2013 ◽  
Vol 40 (2) ◽  
pp. 244-256 ◽  
Author(s):  
Holger Funk
Keyword(s):  
Nineteenth Century ◽  
English Translation ◽  
History Of Botany ◽  
Main Work ◽  
Botanical History ◽  
History Of ◽  
The University ◽  
First Time

In the history of botany, Adam Zalužanský (d. 1613), a Bohemian physician, apothecary, botanist and professor at the University of Prague, is a little-known personality. Linnaeus's first biographers, for example, only knew Zalužanský from hearsay and suspected he was a native of Poland. This ignorance still pervades botanical history. Zalužanský is mentioned only peripherally or not at all. As late as the nineteenth century, a researcher would be unaware that Zalužanský’s main work Methodi herbariae libri tres actually existed in two editions from two different publishers (1592, Prague; 1604, Frankfurt). This paper introduces the life and work of Zalužanský. Special attention is paid to the chapter “De sexu plantarum” of Zalužanský’s Methodus, in which, more than one hundred years before the well-known De sexu plantarum epistola of R. J. Camerarius, the sexuality of plants is suggested. Additionally, for the first time, an English translation of Zalužanský’s chapter on plant sexuality is provided.

Peering Beyond the Imperial Gaze: Using Digital Tools to Construct a Spatial History of Conquest

2017 ◽  
Vol 11 (1) ◽  
pp. 39-54 ◽  
Author(s):  
Jeremy M. Mikecz
Keyword(s):  
Indigenous People ◽  
Indigenous Peoples ◽  
Narrative Analysis ◽  
Digital Tools ◽  
Spanish Conquest ◽  
Digital Maps ◽  
Spatial History ◽  
Colonial Texts ◽  
History Of ◽  
Spatial Narrative

Ethnohistorians and other scholars have long noted how European colonial texts often concealed the presence and participation of indigenous peoples in New World conquests. This scholarship has examined how European sources (both texts and maps) have denied indigenous history, omitted indigenous presence, elided indigenous agency, and ignored indigenous spaces all while exaggerating their own power and importance. These works provide examples of colonial authors performing these erasures, often as a means to dispossess. What they lack, however, is a systematic means of identifying, locating, and measuring these silences in space and time. This article proposes a spatial history methodology which can make visible, as well as measurable and quantifiable the ways in which indigenous people and spaces have been erased by colonial narratives. It presents two methods for doing this. First, narrative analysis and geovisualization are used to deconstruct the imperial histories found in colonial European sources. Second it combines text with maps to tell a new (spatial) narrative of conquest. This new narrative reconstructs indigenous activity through a variety of digital maps, including ‘mood maps’, indigenous activity maps, and maps of indigenous aid. The resulting spatial narrative shows the Spanish conquest of Peru was never inevitable and was dependent on the constant aid of immense numbers of indigenous people.

A Confrontation between Two Doctrines: The Birth of Struggle for Hegemony in Hebrew Children's Literature during the 1930s and 1940s

2008 ◽  
Vol 1 (2) ◽  
pp. 139-155 ◽  
Author(s):  
YAEL DARR
Keyword(s):  
Children's Literature ◽  
Educational System ◽  
Single Channel ◽  
Children’S Literature ◽  
The Political ◽  
Literary Creation ◽  
History Of ◽  
High Level ◽  
First Time ◽  
Literary Quality

This article describes a crucial and fundamental stage in the transformation of Hebrew children's literature, during the late 1930s and 1940s, from a single channel of expression to a multi-layered polyphony of models and voices. It claims that for the first time in the history of Hebrew children's literature there took place a doctrinal confrontation between two groups of taste-makers. The article outlines the pedagogical and ideological designs of traditionalist Zionist educators, and suggests how these were challenged by a group of prominent writers of adult poetry, members of the Modernist movement. These writers, it is argued, advocated autonomous literary creation, and insisted on a high level of literary quality. Their intervention not only dramatically changed the repertoire of Hebrew children's literature, but also the rules of literary discourse. The article suggests that, through the Modernists’ polemical efforts, Hebrew children's literature was able to free itself from its position as an apparatus controlled by the political-educational system and to become a dynamic and multi-layered field.

Digging the history. Absolute chronology of the settlement complex at Czermno-Cherven’ (eastern Poland). Research status and perspectives

2020 ◽  
Vol 72 (2) ◽  
Author(s):  
Tomasz Dzieńkowski ◽  
Marcin Wołoszyn ◽  
Iwona Florkiewicz ◽  
Radosław Dobrowolski ◽  
Jan Rodzik ◽  
...  
Keyword(s):  
Interdisciplinary Research ◽  
Qualitative Change ◽  
Archaeological Research ◽  
Research Status ◽  
History Of ◽  
Absolute Dating ◽  
First Time ◽  
Radiocarbon Datings

The article discusses the results of the latest interdisciplinary research of Czermno stronghold and its immediate surroundings. The site is mentioned in chroniclers’ entries referring to the stronghold Cherven’ (Tale of Bygone Years, first mention under the year 981) and the so-called Cherven’ Towns. Given the scarcity of written records regarding the history of today’s Eastern Poland, Ukraine, and Belarus in the 10th and 11th centuries, recent archaeological research, supported by geoenvironmental analyses and absolute dating, brought a significant qualitative change. In 2014 and 2015, the remains of the oldest rampart of the stronghold were uncovered for the first time. A series of radiocarbon datings allows us to refer the erection of the stronghold to the second half/late 10th century. The results of several years’ interdisciplinary research (2012-2020) introduce qualitatively new data to the issue of the Cherven’ Towns, which both change current considerations and confirm the extraordinary research potential in the archeology of the discussed region.

A Well-Ordered Thing

2018 ◽  
Author(s):  
Michael D. Gordin
Keyword(s):  
Nineteenth Century ◽  
History Of Science ◽  
Periodic Table ◽  
The Arctic ◽  
Classic Work ◽  
Hot Air ◽  
History Of ◽  
First Time

Dmitrii Mendeleev (1834–1907) is a name we recognize, but perhaps only as the creator of the periodic table of elements. Generally, little else has been known about him. This book is an authoritative biography of Mendeleev that draws a multifaceted portrait of his life for the first time. As the book reveals, Mendeleev was not only a luminary in the history of science, he was also an astonishingly wide-ranging political and cultural figure. From his attack on Spiritualism to his failed voyage to the Arctic and his near-mythical hot-air balloon trip, this is the story of an extraordinary maverick. The ideals that shaped his work outside science also led Mendeleev to order the elements and, eventually, to engineer one of the most fascinating scientific developments of the nineteenth century. This book is a classic work that tells the story of one of the world's most important minds.

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