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forebulge |
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forebulge [′fȯr‚bəlj] (geology) An uplift at the edge of a glacier caused by tilting of the lithosphere. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| Flexure of the underlying lithosphere during thrusting might have created a forebulge ahead of the successive depocentres, high enough to be reached by erosion. Orogen-parallel foreland basins have a forebulge, so that part of the drainage and hence a minor component of the detritus originate from the cratonic interior. However, the AFT and topographic data presented in the sections above invite comparison with flexural models built around a positively loaded (offshore sedimentation) and negatively loaded (onshore erosion), nearly broken thin plate whose most attenuated lithosphere is represented by the offshore western margin and whose forebulge is associated with the Gulf of Bothnia (Fig. |
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