Chamberlain's Brook Formation
Geologic formation in Canada
From Wikipedia, the free encyclopedia
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]
TypeFormation
Unit ofAdeyton Group[1]
Sub-unitsFossil Brook Member (and others)
UnderliesManuels River Formation (unconformably?)[2]
| Chamberlain's Brook Formation | |
|---|---|
| Stratigraphic range: Middle Cambrian ~ | |
| Type | Formation |
| Unit of | Adeyton Group[1] |
| Sub-units | Fossil Brook Member (and others) |
| Underlies | Manuels River Formation (unconformably?)[2] |
| Thickness | up to 14 m (46 ft)[2] |
| Lithology | |
| Primary | Green, purple and red siliciclastic marine mudstones[2] |
| Location | |
| Region | Atlantic coast |
| Country | United States Canada |
Occurrence of the Chamberlain's Brook Formation in southeastern Newfoundland | |
