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Bibliographic Details
Main Author: Poppe, L J
Format: Dataset Open Access
Language:en
Published: PANGAEA 1985
Subjects:
Aluminium oxide; ALV-1264; ALV-1268; ALV-1270; ALV82; Alvin; Arsenic; Atomic absorption spectrometry (AAS); Barium; Cadmium; Calcium oxide; Cobalt oxide; Copper(II) oxide; Date/Time of event; DEPTH, sediment/rock; Description; Elevation of event; Energy dispersive X-ray fluorescence spectrometer (ED-XRF); Event label; Grab; GRAB; Iron oxide, Fe2O3; Latitude of event; Lead; Longitude of event; Lydonia Canyon, Atlantic Ocean; Magnesium oxide; Manganese dioxide; Nickel oxide; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Phosphorus pentoxide; Potassium oxide; Sample ID; Silicon dioxide; Sodium oxide; Titanium dioxide; Water in rock; Yttrium; Zinc; Zirconium
Online Access:https://doi.org/10.1594/PANGAEA.855687
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Table of Contents:
  • Ferromanganese coatings have been found on glacial erratics in Lydonia Canyon, off the United States northeastern coast. The coatings, which are about 17 µm thick, consist of an outer manganese-rich layer which covers the top of the erratic, a middle transitional layer, and an internal iron-rich layer that encircles the entire surface of the erratic. Chemical analyses of the coatings, when compared with similar data on abyssal marine ferromanganese deposits, reveal comparable Mn/Fe ratios, higher P and Ti concentrations, and an order of magnitude less of Co, Ni, Cu, and most other metals. A comparison of the Lydonia Canyon coatings with desert varnishes reveals obvious chemical, mineralogical, and morphological differences.

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