Skip to main content

Caerfai Epoch

Caerfai Epoch (Early Cambrian Epoch) The earliest epoch of the Cambrian Period in the chronostratigraphic scale adopted by W. B. Harland et al., 1989, lasting approximately from 570 to 536 Ma ago and comprising the Tommotian, Atdabanian, and Lenian Ages. This epoch has also been termed the Comley Epoch by some authors, and the rocks deposited during this time the Comley Series, underlain by the Ediacaran (Precambrian) and overlain by the St David's. Compare WAUCOBAN (US usage).

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"Caerfai Epoch." A Dictionary of Earth Sciences. . 20 Sep. 2019 <>.

"Caerfai Epoch." A Dictionary of Earth Sciences. . (September 20, 2019).

"Caerfai Epoch." A Dictionary of Earth Sciences. . Retrieved September 20, 2019 from

Learn more about citation styles

Citation styles gives you the ability to cite reference entries and articles according to common styles from the Modern Language Association (MLA), The Chicago Manual of Style, and the American Psychological Association (APA).

Within the “Cite this article” tool, pick a style to see how all available information looks when formatted according to that style. Then, copy and paste the text into your bibliography or works cited list.

Because each style has its own formatting nuances that evolve over time and not all information is available for every reference entry or article, cannot guarantee each citation it generates. Therefore, it’s best to use citations as a starting point before checking the style against your school or publication’s requirements and the most-recent information available at these sites:

Modern Language Association

The Chicago Manual of Style

American Psychological Association

  • Most online reference entries and articles do not have page numbers. Therefore, that information is unavailable for most content. However, the date of retrieval is often important. Refer to each style’s convention regarding the best way to format page numbers and retrieval dates.
  • In addition to the MLA, Chicago, and APA styles, your school, university, publication, or institution may have its own requirements for citations. Therefore, be sure to refer to those guidelines when editing your bibliography or works cited list.