|
|
 |
These pictures were taken on various field trips of geology classes at NVCC Manassas.
T.V. Dagenhart retains copyright on all images, but permission is granted to educators to use the images with proper
citation.
|
|
|
Flooded mine workings at the Sulfur Mine, Louisa County, VA.
|
|
Effects of acid mine drainage along Contrary Creek downstream of the Sulfur Mine, Louisa County, VA.
|
|
|
|
|
Brown acid seepage enters Contrary Creek from tailings of the Sulfur Mine, Louisa County, VA.
|
|
|
|
|
|
Contact between diabase intrusion (brown along joints) and overlying hornfels (gray and layered) at Manassas
Quarry of Vulcan Materials Corporation, Prince William County, VA. Before contact metamorphism, the parent rock of the
hornfels was a red-brown siltstone.
|
|
|
Manassas Quarry of Vulcan Materials Corporation,
Prince William County, VA, a major producer of
crushed diabase.
|
|
|
|
