Publication Date:
2023-08-28
Description:
Metamorphosed and metasomatized basalts, and unmetamorphosed equivalents, were recovered from the steep slopes of Bald Mountain, a north-south elongated seamount lying 60 km west of the Median Rift Valley at 45° N. Block faulting and uplift of the seamount, together with the removal by submarine erosion of extrusive rocks capping the seamount, have resulted in the exposure of the more deep-seated metamorphosed horizons along the fault scarps. The block-faulted nature of Bald Mountain, indicative of brittle fracturing of the upper crustal layers of the Mid-Atlantic Ridge, may be a result of the low ocean floor spreading rates implied from age determinations and magnetic anomaly patterns at 45° N.
Keywords:
Atlantic Ocean; BI 19-66 – Phase 2; Deposit type; DEPTH, sediment/rock; Description; Dredge; DRG; Event label; File name; HUD66/19; HUD66/19-14; HUD66/19-14C; HUD66/19-33; HUD66/19-33C; HUD66/19-35; HUD66/19-47; HUD66/19-47C; HUD66/19-48; HUD66/19-9; HUD66/19-9C; Hudson; Identification; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Photo/Video; Position; PV; Quantity of deposit; Size; Substrate type; Uniform resource locator/link to image; Visual description
Type:
Dataset
Format:
text/tab-separated-values, 82 data points
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