| Name | Hornfels |
| Texture | Non-foliated; Very fine-grained |
| Composition | variable |
| Index Minerals | |
| Color | mottled brownish green |
| Miscellaneous | Very hard |
| Metamorphic Type | Contact |
| Metamorphic Grade | Variable |
| Parent Rock | Shale or Mudstone |
| Metamorphic Environment | Contact metamorphism; immediately adjacent to igneous intrusion at shallow depths |