I got this answer from a local mushroom club.
At 05:29 PM 7/22/2014, you wrote:
Good afternoon. I live and work in Harford county Maryland and discovered this growth that I have not seen before. It was/is established on the edge of a mixed hardwood forest all the side of a driveway of crushed stone. The surface is dry, the surface texture abrasive, the structure is hard and quite difficult to break, the odor is mild. If any member is familiar with this variety I would be most pleased to know more about it than I have been able to learn so far on my own.
It's called "Deadman's fingers" or Xylaria polymorpha. Check out
http://www.mushroomexpert.com/xylaria_polymorpha.html
We find it around here every once in a while, but it's always a source of interest and amusement when it crops up.
Cheryl Dawson for Eastern Penn Mushroomers