A Geoscience Digital Image Library
A Geoscience Digital Image Library
| Title | Hornfels, from near Lambertville, New Jersey, USA |
|---|---|
| Description | Hornfels is a general term describing a fine-grained metamorphic rock that displays no metamorphic fabric. Hornfels typically forms by contact metamorphism. In western New Jersey, intrusion of magma has caused local metamorphism of sedimentary rocks. In places, the mudstones and shales of the Lockatong and Brunswick Formations have been affected. This specimen is an example. It comes from near the New Jersey-Pennsylvania border and is 9.6 cm across. The degree of metamorphism is very low, and some metamorphic geologists might still consider this a sedimentary rock. |
| Location | USA ▹ New Jersey. Near Lambertville. |
| Photographer | Nessa Eull. 2001-05-22. |
| Collection | Ward’s University Rock Collection #169. |
| Key words | hornfels, New Jersey, contact metamorphism |
| Tech details | 819 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens. |
| GeoDIL number | 502 |
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