Transtensional arm of the early Mesozoic Fundy rift basin: Penecontemporaneous faulting and sedimentation

Olsen, Paul E.; Schlische, Roy W.

doi:10.1130/0091-7613(1990)018<0695:taotem>2.3.co;2

Cited by 65 publications

(41 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This discontinuous magmatism has given rise to different tectonogenetic hypotheses: Harmand and Cantagrel (1984), Berrahma (1989) and Ait Brahim and Chotin (1990) tried to connect the active periods with tectonic phases; for instance, Harmand and Cantagrel (1984) claim that volcanism and compression are coeval, but the loose tirne-strati graphic control limits the validity of this and similar hypotheses. Gomez et al (1996) proposed that the whole Meseta block (the lithospheric subplate north of the Atlas Mountains) is escaping towards the Atlantic along the Trans-Alboran Fault as a consequence of the compression from the north, a scheme already advanced by Olsen and Schlische (1990). Another tectonic synthesis (Froitzheim et aI., 1988) takes into aCCOlll1t both compression and lateral response, and on the basis of the frequent flower structures found puts forward the hypothesis that the Atlas Mountains has been subjected during the whole Ceno zoic to transpressive and transtensive movements.…”

Section: Volcanismmentioning

confidence: 96%

The Canary Islands origin: a unifying model

Anguita

Hernán

2000

Journal of Volcanology and Geothermal Research

197

128

View full text Add to dashboard Cite

A new model, partially based on the three most widely cited previous hypotheses, is proposed to explain the genesis of the Canary Islands. From the hotspot hypothesis it retains the notion that the islands originated from a thermal anomaly in the mantle. From the propagating fracture hypothesis it takes the critical role of regional fractures in the onset of magmatism. The uplifted block hypothesis contributes with the notion that the islands are in their present freeboard attitude due to the action of tectonic forces.The main drawbacks of the three preceding hypotheses are solved within this unifying approach: the thermal anomaly is an upper mantle residue from an old plume, and therefore it does not carry (or does it in a highly diluted form) the typical geophysical and geochernical plume signatures; the fractures are well developed on the continental and oceanic crust, but not in the extremely thick sedimentary pile between the Canary Islands and Africa; and the Canary Islands uplift took place through transpressive shears, and not by means of purely reverse faults. This unifying model, which integrates the thermal and tectonic histories of the lithosphere and the sublithospheric mantle, is considered to be a valid approach to a number of volcanic areas where, as has been highlighted in recent years, pure hotspot or pure fracture models are found wanting to explain oceanic or (less frequently) continental volcanic lines.

show abstract

Section: Volcanismmentioning

confidence: 96%

The Canary Islands origin: a unifying model

Anguita

Hernán

2000

Journal of Volcanology and Geothermal Research

197

128

View full text Add to dashboard Cite

show abstract

“…The basins of the eastern North American rift system are mostly half graben bounded by predominantly normal-slip border faults, although some basins or subbasins are bounded by oblique-slip faults [e.g., Manspeizer, 1988;Olsen and Schlische, 1990;Schlische, 1993Schlische, , 2002 ( Figure 3). The rocks within and surrounding the rift basins may be subdivided into prerift, synrift, and postrift units.…”

Section: Basic Concepts and Definitionsmentioning

confidence: 99%

Relative timing of CAMP, rifting, continental breakup, and basin inversion: Tectonic significance

Schlische

Withjack

Olsen

2003

Geophysical Monograph Series

Self Cite

View full text Add to dashboard Cite

“…North Mountain Basalt is complex not only due to postdepositional faulting but also because of sedimentation during faulting Olsen and Schlische 1990;Tanner and Hubert 1991). Probably related to the syntectonic sedimentation is the fact the McCoy Brook Formation is by far the most tetrapod-rich stratigraphic unit of the Fundy Group, with every major outcrop yielding tetrapod bones, or tracks, or both.…”

mentioning

confidence: 99%

Stratigraphic and temporal context and faunal diversity of Permian-Jurassic continental tetrapod assemblages from the Fundy rift basin, eastern Canada

Sues

Olsen

2015

atgeol

View full text Add to dashboard Cite

The Fundy basin in Nova Scotia and New Brunswick is the largest exposed rift basin of the Newark Supergroup and also extends beneath the Bay of Fundy. Its strata can be divided into four tectonostratigraphic sequences (TS). TS I is represented by the probably Permian Honeycomb Point Formation and possibly the Lepreau Formation. TS II includes the Wolfville Formation with the probably Middle Triassic Economy Member and the early Late Triassic Evangeline Member. These members have yielded markedly different assemblages of continental tetrapods. TS III comprises most of the Blomidon Formation, which is Norian to Rhaetian in age. The Blomidon Formation has yielded few skeletal remains of tetrapods to date but many tetrapod tracks. TS IV includes the late Rhaetian top of the Blomidon Formation and the McCoy Brook Formation, which overlies the North Mountain Basalt and is latest Rhaetian and earliest Jurassic (Hettangian) in age. The McCoy Brook Formation has yielded a diversity of continental tetrapods and lacks any of the characteristic Late Triassic forms. Recent work has correlated the Global Boundary Stratotype Section and Point (GSSP) for the base of the Jurassic (Hettangian) to a level well above the North Mountain Basalt. Thus most of the tetrapod fossils from the McCoy Brook Formation are latest Rhaetian in age, but the higher horizon with skeletal remains of sauropodomorph dinosaurs may be earliest Hettangian in age. The Fundy basin preserves the only known, stratigraphically tightly constrained record of the profound biotic changes in continental ecosystems across the Triassic-Jurassic transition.

show abstract

Transtensional arm of the early Mesozoic Fundy rift basin: Penecontemporaneous faulting and sedimentation

Cited by 65 publications

References 19 publications

The Canary Islands origin: a unifying model

The Canary Islands origin: a unifying model

Relative timing of CAMP, rifting, continental breakup, and basin inversion: Tectonic significance

Stratigraphic and temporal context and faunal diversity of Permian-Jurassic continental tetrapod assemblages from the Fundy rift basin, eastern Canada

Contact Info

Product

Resources

About