The county map below provides some context for the density of linework...much of it compiled from published sources. However, most of those sources are quite general and particularly weak on the Q geology...which is our focus. Note, a couple of them are strong on Q, which is good news for us.

The second image shows a close-up in the NW corner of the county. The mismatch you see is dominated by our refinement of the bedrock-alluvium contact. Other mismatch related to incomplete (in progress) carving out surficial units. In other words, the polys are based on the original linework...haven't rebuilt the entire set yet.