forebulge


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forebulge

[′fȯr‚bəlj]
(geology)
An uplift at the edge of a glacier caused by tilting of the lithosphere.
References in periodicals archive ?
The Fennoscandian postglacial rebound and glacial forebulge in relation to the underlying tectonic stress have engendered a pattern of alternating regions of higher and lower seismicity, whereas evidences of active faulting and seismicity are mostly connected to the areas where ice sheets reached their maximum thickness, including the marginal regions (Morner 2003; Steffen & Wu 2011; Hoffmann & Reicherter 2012; Brandes et al.
It was followed by development of an Acadian forebulge and foredeep which migrated northwestward from coastal Maine through the study area until the Middle Devonian.
Si el forebulge esta emergido, este segmento corresponde al area fuente de los depositos arenosos que se acumulan en el sector mas distal del foredeep (FIGURA 6A); por el contrario, si el forebulge esta por debajo del nivel base, ya sea por subsidencia producto de topografia dinamica, por aumento del nivel de base global o por sobrellenado de la cuenca por alto aporte sedimentario, este segmento junto con la parte distal del foredeep se convierte en la zona axial de los sistemas de acumulacion (Reyes-Harker et al, 2015) procedentes del orogeno al occidente de las rocas expuestas sobre el escudo de la Guyana al oriente (FIGURA 6B), e inclusive de altos intracuenca expuesto en el Mioceno medio-tardio al sur en el Arco del Vaupes (Bayona et al, 2008a; Bayona et al, 2008b).
Seisms concentrate toward the SE of the Madrid Basin, owing to a flexural forebulge, and in basement faults at the southern edge of the Central System (Fig.
One area, the Bisoni-McKay, at the south end of the Fish Creek Range, displays an olistostrome, shed eastward during the Late Devonian (early Famennian) from a migrating Antler orogenic forebulge.
At the margins of the Guayana Shield and in the outer areas of the peripheral forebulge was deposited the Eocene Caratas Formation, marking the end of the continental passive margin stage in Northeastern Venezuela.
Forebulge dynamics and environmental control in Western Amazonia: The case study of the Arch of Iquitos (Peru).
In addition, on the distal part of a foreland basin (such as Tingri and Gamba), the forebulge will occur earlier than the foredeep, and consequently the age of the forebulge may better constrain the timing of the IIACC.
The initial fall in sea level after deglaciation was caused by isostatic rebound and the passing of a crustal forebulge northward across the region.
Eustatic sea-level rise, local tectonic events, isostatic adjustment, flexure of the glacial forebulge, and tidal expansion have collectively affected the marine limit in the Bay of Fundy (Struiver and Borns 1975; Rampton and Paradis 1981; Seaman 1982; Rampton et al.
the wedgetop depozone, the foredeep depozone, the forebulge depozone and the backbulge depozone.
Deglaciation was accompanied by isostatic rebound that varied according to the thickness of ice and the passing of a forebulge, and by concurrent rising eustatic sea level (Quinlan and Beaumont 1981).