Purgatory Conglomerate
Dating to the Carboniferous period, the Purgatory Conglomerate is a geologic formation in Rhode Island.[1][2][3][4][5][6]
| Purgatory Conglomerate | |
|---|---|
| Stratigraphic range: Carboniferous (Pennsylvanian) | |
| Type | Formation |
| Unit of | Narragansett Bay Group Informal: Rhode Island Group (RI)[1] |
| Lithology | |
| Primary | "near metamorphic" conglomerate |
| Location | |
| Region | New England (Rhode Island)[1] |
| Country | United States |
| Type section | |
| Named for | Purgatory, Middletown, Newport, RI |
References
- "Geologic Unit: Purgatory". National Geologic Database. Geolex — Significant Publications. United States Geological Survey. Retrieved 2021-03-26.
- August 29, 2016 Chris Watson (August 29, 2016). "KVH Tackles Difficult Problems – Even Coastal Pollution Near its RI Headquarters". Company. KVH Mobile World. Retrieved 2021-03-27.
Scientists are intrigued by the formation. Geologists cite the significance of Purgatory Chasm – Purgatory Conglomerate is their name for it – as an important example of erosion due to wave action and as an illustration of rock compression millions of years ago.
- S Mosher (1987). "Pressure-solution deformation of the purgatory conglomerate, rhode island (u.s.a.): quantification of volume change, real strains and sedimentary shape factor". Journal of Structural Geology. 9 (2): 221–232. doi:10.1016/0191-8141(87)90027-7. Retrieved 2021-03-27.
Pressure solution has caused substantial volume redistribution within the Purgatory Conglomerate from Rhode Island.
- Yvette D. Kuiper, Boston College. "Deformation Mechanisms and History of the Purgatory Conglomerate, Rhode Island". Annual Report on Research. ACS Petroleum Research Fund. 54th (47487–GB8). Retrieved 2021-03-27.
The Purgatory Conglomerate of Rhode Island experienced two generations of Alleghanian folding, and subsequent local shearing.
- "Pebbles of Purgatory Chasm". Events. Audubon Society of Rhode Island. Retrieved 2021-03-27.
Purgatory Chasm in Newport cuts into one of Rhode Island's most spectacular rock formations: the Purgatory conglomerate.
- McPherren, Eric D.; Kuiper, Yvette D. (June 2013). "The effects of Dissolution-Precipitation Creep on quartz fabrics within the Purgatory Conglomerate, Rhode Island". Journal of Structural Geology. 51: 105-117. Bibcode:2013JSG....51..105M. doi:10.1016/j.jsg.2013.03.002. Retrieved 2021-03-27.
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