Woodstock, Millville and Coldstream map-areas, Carleton and York counties, New Brunswick

Anderson, F D

doi:10.4095/101485

Cited by 7 publications

(5 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A thick succession of Cambro-Ordovician sandstone and shale in west-central New Brunswick was mapped at 1:63,390 scale by Anderson (1968) and in more detail at 1:15,480 scale by Venugopal (1979Venugopal ( , 1981. This unnamed sequence includes light grey to light green, medium-to thick-bedded quartzite, grey to greenish grey, thin-to medium-bedded quartz wacke, olive-green silty shale and minor red sandstone and shale.…”

Section: Baskahegan Lake Formationmentioning

confidence: 99%

Stratigraphy and geochemistry of Ordovician volcanic rocks of the Eel River area, west-central New Brunswick

Fyffe

2001

atgeol

View full text Add to dashboard Cite

Early Paleozoic turbiditic sedimentary rocks and submarine volcanic-arc rocks in the Eel River area have been designated, respectively, as the Woodstock and Meductic groups and divided into six formations. The Woodstock Group includes interbedded Cambrian to Early Ordovician quartz vvacke. sandstone, and shale of the Baskahegan Formation and overlying Early Ordovician silty mudstone and shale of the Bright Eye Brook Formation. The conformably overlying Meductic Group is divided into the Early Ordovician Porten Road Formation (mainly rhyolite). Eel River Formation (mainly andesite), and Oak Mountain Formation (basalt), and Late Ordovician Belle Lake Formation (feldspathic wacke and shale).Pyroxene-bearing, low-silica andesite in the lower part of the Porten Road Formation is highly enriched in LREE and LFSE. and depleted in HFSE relative to MORB. evidence of subduction in a compressional-continental arc setting. The upper part of the Porten Road Formation comprises an interlayered sequence of quartz-rich rhyolite and quartz-poor dacite. likely derived from melting of continental crust. The Eel River Formation contains hornblende-bearing, high-silica andesite moderately enriched in LFSE. Calc-alkaline basalt from the overlying Oak Mountain Formation includes low-and highalumina basalt varieties like those formed in an extensional-continental arc setting. Volcanic activity in the Meductic Group ceased in the later part of the Early Ordovician as the arc rifted and the subduction zone migrated northwestward with the opening of the Tetagouche back-arc basin. L'andesite a faible teneur en silice qui renferme de la pyroxene dans la partie inferieure de la Formation de Porten Road est fortement enrichie en ETRL (elements de terres rares legers) et en EF1C (elements a faible intensite de champ) et pauvre en EHIC (elements a haute intensite de champ) comparativement aux BDMO (basaltes de la dorsale medio-oceanique). ce qui temoigne d'une subduction au cours de Fetablissement d'un arc compressif-continental. La partie superieure de la Formation de Porten Road comporte une sequence interstratifiee de rhyolite riche en quartz et de dacite pauvre en quartz provenant vraisemblablement de la fusion de la croute continentale. La Formation d'Eel River renferme de Fandesite riche en silice a hornblende moyennement enrichie d'EFIC. Le basalte ealco-alcalin de la Formation sus-jacente d'Oak Mountain comprend des basaltes a faible et forte teneur en alumine comme ceux formes lors de Fetablissement d'un arc d'accretioncontinental. L'activite volcanique dans le groupe de Meductic a cesse vers la fin de FOrdovicien inferieur lorsque Fare s'est effondre et que la zone de subduction a migre vers le nord-ouest avec I'ouverture du bassin marginal de Tetagouche. Traduit par la redaction I n t r o d u c t io nThe Eel River area of west-central New Brunswick (Figs. 1, 2) is underlain by Ordovician volcanic rocks that provide important constraints on the Paleozoic tectonic history of the Appalachian orogen (van Staal and Fyffe 1995a). These vo...

show abstract

Section: Baskahegan Lake Formationmentioning

confidence: 99%

Stratigraphy and geochemistry of Ordovician volcanic rocks of the Eel River area, west-central New Brunswick

Fyffe

2001

atgeol

View full text Add to dashboard Cite

show abstract

“…1). This sequence has never previously yielded fossils of any description, its age being inferred by Anderson (1968) and Venugopal (1979Venugopal ( ,1981 from its local relationship to stratigraphically overlying Lower Ordovician graptolitic shale and its overall lithologic similarity to known pre-Arenigian sequences in central Maine and New Brunswick (Neuman 1984).…”

Section: Introductionmentioning

confidence: 89%

“…The oldest rocks exposed in the Woodstock-Meductic area o f New Brunswick are a thick sedimentary sequence comprising the Baskahegan Lake Formation (Ludman 1991;Ludman et al 1993) and the overlying Bright Eye Brook Formation (van Staal and Fyffe 1991). These rocks were mapped in New Brunswick at 1:63 390 scale by Anderson (1968) and in more detail (1:15 480) by Venugopal (1979Venugopal ( , 1981. Venugopal (1981) subdivided his unnamed Cambrian-Ordovician sequence into two broad lithological assemblages:…”

Section: Stratigraphymentioning

confidence: 99%

See 1 more Smart Citation

The stratigraphic significance of trace fossils from the Lower Paleozoic Baskahegan Lake Formation near Woodstock, west-central New Brunswick

Pickerill

Fyffe

1999

atgeol

View full text Add to dashboard Cite

The first indication o f organic activity in Lower Paleozoic siliciclastic turbidites of the Miramichi Terrane has been found in a small quarry at Grafton Hill, near Woodstock, west-central New Brunswick. These previously unnamed turbidites are assigned to the Baskahegan Lake Formation defined in adjacent Maine. The Grafton Hill site has yielded the ichnotaxa Circulichnis montanus, Gordia? marina, Helminthopsis hierogiyphica, Planolites annularius and Planolites montanus. The presence of Circulichnus montanus supports previous circumstantial evidence that a considerable part of the Baskahegan Lake Formation is Early Ordovician in age and substantiates correlation with other quartz-rich peri-Gondwanan sequences elsewhere in the Appalachian-Caledonide Orogen.La premiere indication d'une activity organique dans les turbidites silicoclastiques du Paldozoi'que inferieur du terrane de Miramichi a dtd observee dans une petite carriere de Grafton Hill, pres de Woodstock, dans la region du centre ouest du Nouveau Brunswick. Ces turbidites non identifies prdcedemment sont attributes h la formation de Baskahegan Lake, circonscrite dans la rtgion limitrophe du Maine. Le site de Grafton Hill contenait des traces fossilisees des esptces Circulichnis montanus, Gordia? marina, Helminthopsis hierogiyphica, Planolites annularius et Planolites montanus. La presence de l'espece Circulichnus montanus corrobore des observations circonstancielles anterieures voulant qu'une partie considerable de la formation de Baskahegan Lake appartienne a l'Ordovicien inferieur et confirme la correlation existant avec d'autres sequences lithologiques fortement quartziques en bordure de la Gondwanie ailleurs dans l'orogenese appalachienne et caltdonienne.

show abstract

“…This 1napping was carried out to obtain a better understanding of some of the geologic problems in Maine by ( 1) defining the eastern boundary of the Carys Mills Formation in adjoining New Brunswick and ( 2) reconciling differences between the writer's mapping in Maine and that of Anderson ( 1954aAnderson ( , 1956) and Anderson and Poole ( 1959) in contiguous New Brunswick. This reconnaissance (Pavlides, 1966a) yielded a different stratigraphic sequence and structural framework :for the Woodstock and Goldstream areas of New Brunswick than had been mapped earlier by Anderson (1954aAnderson ( , 1956. In general, this geologic model is now also recognized in New Brunswick by Anderson (written commun., Dec. 1965), with minor differences as to the position of contacts between some of the stratigraphic units.…”

mentioning

confidence: 99%

Stratigraphic and facies relationships of the Carys Mills Formation of Ordovician and Silurian age, northeast Maine

Pavlides¹

1968

View full text Add to dashboard Cite

Woodstock, Millville and Coldstream map-areas, Carleton and York counties, New Brunswick

Cited by 7 publications

References 0 publications

Stratigraphy and geochemistry of Ordovician volcanic rocks of the Eel River area, west-central New Brunswick

Stratigraphy and geochemistry of Ordovician volcanic rocks of the Eel River area, west-central New Brunswick

The stratigraphic significance of trace fossils from the Lower Paleozoic Baskahegan Lake Formation near Woodstock, west-central New Brunswick

Stratigraphic and facies relationships of the Carys Mills Formation of Ordovician and Silurian age, northeast Maine

Contact Info

Product

Resources

About