 |
|
| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z |
| • HOME • ABOUT • CATEGORIES • USE OF TEXT AND IMAGES • NEWSLETTER   
|
marl
A natural mixture of clay and calcium carbonate (CaCO3). If the former predominates, it is a mudstone; if the latter, it is termed calcareous. Greensand marls contain hardly any calcium carbonate (see also glauconite). Marls are used as soil conditioners and in making portland cement.
Related category
• GEOLOGY AND PLANETARY SCIENCEAlso on this site:
Encyclopedia of Alternative Energy & Sustainable Living
Encyclopedia of History