Copyright notice

This article is from the Encyclopedia of North Carolina edited by William S. Powell. Copyright © 2006 by the University of North Carolina Press. Used by permission of the publisher. For personal use and not for further distribution. Please submit permission requests for other use directly to the publisher.

Is anything in this article factually incorrect? Please submit a comment.

Printer-friendly page

Marl Beds

by Louis P. Towles, 2006Marl Beds, Jones County. Image courtesy of DocSouth, UNC Libraries.

Marl beds are found along the eastern and southeastern coastline of the United States and on land across the world that was once covered by the sea. Such beds, referred to by Roman writer Marcus Varro as "white fossil clay," were formed by the breakdown of rock and the buildup of seashell, animal, and plant remains. The result was a varying mixture of sand, clay, azote, magnesium, iron, and limestone that was used by the Greeks, Romans, Gauls, Britons, and others to add lime, a natural fertilizer, to the soil.

In North Carolina, marl has been found in most of the counties that make up the coastal plain. This marl area, which consists of more than 20,000 square miles, extends west from the fall line and is in places nearly 200 miles from the Atlantic shore. North Carolina's natural limestone was far less valuable and accessible than that of neighboring states. The blue/gray and green marls, found chiefly in Pitt, Columbus, Wayne, Lenoir, Craven, Duplin, and Onslow Counties, were generally suitable only for supplemental side-dressing of the lighter and poorer state soils. Since the effect lasted for little more than a season, few farmers availed themselves of local "white fossil clay." By the early 2000s, marl beds in the state were lying dormant.


F. Willard Berry, Marls and Limestones of Eastern North Carolina (1947).

Gerald F. Loughlin, Limestones and Marls of North Carolina (1921).

Additional Resources:

Report of the North Carolina geological survey, together with descriptions of the fossils of the marl beds (1858). Internet Archive. Available from (accessed September 25, 2012).

Image Credits:

Marl Beds, Jones County. Image courtesy of DocSouth, UNC Libraries. Available from (accessed September 25, 2012).



Our marl bed is being used to make aglime and Feed Lime. Shelter Creek Lime and Stone in Pender County NC. Please pass the word. We would like to support our local farmers with local products.

Add a comment

PLEASE NOTE: NCpedia provides the comments feature as a way for viewers to engage with the resources. Comments are not published until reviewed by NCpedia editors at the State Library of NC, and the editors reserve the right to not publish any comment submitted that is considered inappropriate for this resource. NCpedia will not publish personal contact information in comments, questions, or responses. If you would like a reply by email, note that some email servers, such as public school accounts, are blocked from accepting messages from outside email servers or domains. If you prefer not to leave an email address, check back at your NCpedia comment for a reply. Please allow one business day for replies from NCpedia. Complete guidelines are available at