Chamberlain's Brook Formation

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Chamberlain's Brook Formation
Stratigraphic range: Middle Cambrian
~509–506  Ma
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Type Formation
Unit of Adeyton Group [1]
Sub-unitsFossil Brook Member (and others)
Underlies Manuels 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
Chamberlains Brook Formation map.svg
Occurrence of the Chamberlain's Brook Formation in southeastern Newfoundland

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]

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. 1 2 3 4 5 6 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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