 |
|
| 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 • COPYRIGHT • NEWSLETTER   
|
sill
A tabular, parallel-sided sheet of igneous rock, formed underground, that is parallel to the layered rocks around it. Sills may be from under 1 cm to over 100 m thick and perhaps hundreds of kilometers wide.
Related category
• GEOLOGY AND PLANETARY SCIENCEAlso on this site:
Encyclopedia of Alternative Energy & Sustainable Living
Encyclopedia of History