Not logged in
PANGAEA.
Data Publisher for Earth & Environmental Science

McPherren, Eric D; Kuiper, Yvette D (2012): Results from Purgatory Conglomerate investigations [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.773313, Supplement to: McPherren, ED; Kuiper, YD (2013): The effects of Dissolution–Precipitation Creep on quartz fabrics within the Purgatory Conglomerate, Rhode Island. Journal of Structural Geology, 51, 105-117, https://doi.org/10.1016/j.jsg.2013.03.002

Always quote citation above when using data! You can download the citation in several formats below.

RIS CitationBibTeX CitationShow MapGoogle Earth

Abstract:
Quartz Crystallographic Preferred Orientation (CPO) patterns are most commonly a result of deformation by dislocation creep. We investigated whether Dissolution-Precipitation Creep (DPC) a process that occur at lower differential stresses and temperatures, may result in CPO in quartz. Within the Purgatory Conglomerate, DPC led to quartz dissolution along cobble surfaces perpendicular to the shortening direction, and quartz precipitation in overgrowths at the ends of the cobbles (strain shadows), parallel to the maximum extension direction. The Purgatory Conglomerate is part of the SE Narragansett basin where strain intensity increases from west to east and is associated with top-to-the-west transport and folding during the Alleghanian orogeny. Quartz c-axis orientations as revealed by Electron Backscatter Diffraction (EBSD) methods, were random in all analyzed domains within the cobbles and strain shadows irrespective of the intensity of strain or metamorphic grade of the sample. Quartz dissolution probably occurred exclusively along the cobbles' margins, leaving the remaining grains unaffected by DPC. The fact that quartz precipitated in random orientations may indicate that the strain shadows were regions of little or no differential stress.
Related to:
McPherren, Eric D; Kuiper, Yvette D; Beane, Rachel (2010): Dissolution-precipitation creep on the crystallographic preferred orientation of quartz within the Purgatory Conglomerate, RI. Geological Society of America, Abstracts with Programs, 42(5), 635
Coverage:
Median Latitude: 41.514660 * Median Longitude: -71.240364 * South-bound Latitude: 41.483325 * West-bound Longitude: -71.266738 * North-bound Latitude: 41.546000 * East-bound Longitude: -71.215000
Event(s):
Site_1 * Latitude: 41.483325 * Longitude: -71.266738 * Location: Purgatory Chasm, Newport, Rhode Island, USA * Method/Device: Geological sample (GEOS)
Site_2 * Latitude: 41.514619 * Longitude: -71.233289 * Location: Black Point, Rhode Island, USA * Method/Device: Geological sample (GEOS)
Site_3 * Latitude: 41.546000 * Longitude: -71.215000 * Location: Hill Point, Rhode Island, USA * Method/Device: Geological sample (GEOS)
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
3 datasets

Download Data

Download ZIP file containing all datasets as tab-delimited text — use the following character encoding:

Datasets listed in this publication series

  1. McPherren, ED; Kuiper, YD (2012): Appendix A: Cobble sample images. https://doi.org/10.1594/PANGAEA.773323
  2. McPherren, ED; Kuiper, YD (2012): Appendix B: Cobble dimensions and orientations of the Purgatory Conglomerate. https://doi.org/10.1594/PANGAEA.773260
  3. McPherren, ED; Kuiper, YD (2012): Cobble shapes and shape change in Purgatory Conglomerate. https://doi.org/10.1594/PANGAEA.773312