Chamberlain's Brook Formation

The Chamberlain's Brook Formation is a thin but distinctive geologic formation of dark red calcareous mudstones[3] that crops out from Rhode Island to Massachusetts and, Nova Scotia, New Brunswick and Newfoundland.[2] It preserves fossils, including trilobites, dating back to the lower mid-Cambrian period.[2] Its lowermost member is the Braintree Member (lowest Middle Cambrian) and the uppermost member is the Fossil Brook Member.[2]

Chamberlain's Brook Formation
Stratigraphic range: Middle Cambrian
~509–506 Ma
TypeFormation
Unit ofAdeyton Group[1]
Sub-unitsFossil Brook Member (and others)
UnderliesManuels River Formation (unconformably?)[2]
Thicknessup to 14 m (46 ft)[2]
Lithology
PrimaryGreen, purple and red siliciclastic marine mudstones[2]
Location
RegionAtlantic coast
Country United States
 Canada

Occurrence of the Chamberlain's Brook Formation in southeastern Newfoundland

See also

References

  1. Terrence Patrick Fletcher (2006). Bedrock Geology of the Cap St. Mary's Peninsula. Southwest Avalon Peninsula, Newfoundland (PDF). St. John's Newfoundland: Department of Natural Resources Geological Survey Newfoundland Labrador. ISBN 1-55146-031-9.
  2. Kim, Dong HEE; Westrop, Stephen R.; Landing, ED (2002). "Middle Cambrian (Acadian Series) Conocoryphid and Paradoxidid Trilobites from the Upper Chamberlain's Brook Formation, Newfoundland and New Brunswick". Journal of Paleontology. 76 (5): 822. doi:10.1666/0022-3360(2002)076<0822:MCASCA>2.0.CO;2.
  3. Normore, L. S. 2012: GEOLOGY OF THE RANDOM ISLAND MAP AREA (Nts 2C/04), Newfoundland. Current Research (2012) Newfoundland and Labrador Department of Natural Resources Geological Survey Report 12-:121–145.
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