This seaway separated the peri-Gondwanan microcontinent
of Avalonia (see inset on Fig.
Torsvik and his colleagues say that if their theory pans out, there could be a lot more microcontinents
hidden deep beneath the ocean.
(1992) in maintaining that Avalonia was part of Gondwana throughout this time interval until the Early Ordovician, whereas Landing and co-workers maintain that Avalonia was a separate microcontinent
at different paleolatitudes during the late Neoproterozoic and Cambrian.
However, the inevitable arrival of microcontinents
and/or oceanic plateaux at the trench may induce temporary compression, in which the rheologically softened crust undergoes thickening driving the P-T-t path to higher pressures (into a CCW path).
New England is composed of tectonic blocks, microcontinents
, and/or terranes accreted to eastern Laurentia primarily during the Silurian-Devonian Salinic, Acadian, and Neoacadian orogenies, and the Pennsylvanian-Permian Alleghanian orogeny (O'Hara and Gromet 1985; Goldstein 1989; Skehan and Rast 1990; Wintsch et al.
(2008): Inversion of moment tensor focal mechanisms for active stresses around the microcontinent
Iberia: Tectonic implications.
1.88 Ga magmatism in the Cape Smith belt and Labrador Trough has been linked to rifting and possible separation of a microcontinent
(St-Onge et al., 2000).
1B) formed due to the oblique convergence and collision between the microcontinent
Iberia and Eurasia from Late Cretaceous until Early Miocene times (Dewey et al., 1989; Srivastava et al., 1990; Munoz, 1992; Jabaloy et al., 2002; Andeweg, 2002).
Accretion of the Dashwoods microcontinent
to Laurentia produced the Taconic Orogeny (ca.
To the southwest of the Lapland-Savo Orogenic Belt and the Keitele microcontinent
, 1.90-1.88 Ga dated latitudinally extending Fennian orogenic suites form the Tampere, Mine, and Uusimaa volcanic-sedimentary belts of island arc origin in southern Finland (Korja et al.
Subsequently, the rifting of the arc from the continental margin and its northward drifting is considered coeval with that of the Avalonia microcontinent
(Gomez Barreiro et al., 2007; Murphy and Gutierrez Alonso, 2008).
Precambrian-Cambrian boundary interval deposition and the marginal platform of the Avalon microcontinent
. Journal of Geodynamics, 37, pp.