ACADIAN, in geology, the name given by Sir J. W. Dawson in 1867 to a series of black, red and green shales and slates, with dark grey limestones, which are well developed at St John, New Brunswick; Avalon in E. Newfoundland, and Braintree in E. Massachusetts. These rocks are of Middle Cambrian age and possess a Paradoxides fauna. They have been correlated with limestone beds in Tennessee, Alabama, central Nevada and British Columbia (St Stephen).
See CAMBRIAN SYSTEM; also C. D. Walcott, Bull.
U.S. Geol. Survey, No. 81, 1891; and Sir J. W.
Dawson, Acadian Geology, 1st ed. 1855, 3rd ed. 1878.
Note - this article incorporates content from Encyclopaedia Britannica, Eleventh Edition, (1910-1911)