Map Unit Lines (ig) (35)
| Igneous Rock |
Faults (56)
| fault, thrust |
| fault, unclassed |
Geologic Lines (34)
| Anticline |
|
| Syncline |
| <all other values> |
Contacts and Boundaries (55)
| contact |
| map boundary |
Cenozoic (Qal) (44)
| Qal - CEN, Quaternary Alluvium |
Permian or Pennsylvanian (P,Pn) (45)
| Pd - PER, Dunkard Group |
Pennsylvanian (Pn) (46)
| Pnm - PEN, Monongahela Group |
| Pnc - PEN, Conemaugh Group |
| Pna - PEN, Allegheny Formation |
| Pnpv - PEN, Pottsville Group |
| Pnk - PEN, Kanawha Formation |
| Pnnr - PEN, New River Formation |
| Pnp - PEN, Pocahontas Formation |
Mississippian (M) (47)
| Mmc - MIS, Mauch Chunk Group |
| Mbp - MIS, Bluestone and Princeton Formations |
| Mh - MIS, Hinton Formation |
| Mbf - MIS, Bluefield Formation |
| Mg - MIS, Greenbrier Group |
| Mmp - MIS, Maccrady and Price (Pocono), undivided |
| Mmcc - MIS, Maccrady Formation |
| Mp - MIS, Price Formation (previously: Pocono Group) |
Devonian (D) (48)
| Dmu - DEV, Middle and Upper Devonian, undivided |
| Dhs - DEV, Hampshire Formation |
| Dgg - DEV, Dgg - Greenland Gap Group (previously: Chemung Group) |
| Dbh - DEV, Brallier Formation and Harell Shale |
| Db - DEV, Brallier Formation |
| Dh - DEV, Harrell Shale |
| Dmb - DEV, Millboro Shale |
| Dmt - DEV, Mahantango Formation |
| Dmn - DEV, Marcellus Formation and Needmore Shale |
| Dm - DEV, Marcellus Formation |
| Dohl - DEV, Oriskany Sandstone and Helderberg Group |
| Dhl - DEV, Helderberg Group |
| Do - DEV, Oriskany Sandstone |
Silurian (S) (49)
| Stw - SIL, Tonoloway, Wills Creek, and Williamsport Formations |
| Sct - SIL, Clinton Group and Tuscarora Sandstone |
| Smc - SIL, McKenzie Formation and Clinton Group |
| St - SIL, Tuscarora Sandstone |
Ordovician (O) (50)
| Ojo - ORD, Juniata and Oswego Formations |
| Om - ORD, Martinsburg Formation |
| Omc - ORD, Ordovician, middle calcareous units |
| Otbr - ORD, Trenton Group and Black River Group, undivided |
| Ot - ORD, Trenton Group |
| Obr - ORD, Black River Group |
| Osp - ORD, St. Paul Group |
| Ob - ORD, Beekmantown or Lower Ordovician Group |
| Obps - ORD, Pinesburg Station Dolomite |
| Obrr- ORD, Rockdale Run Formation |
| Obs - ORD, Stonehenge Limestone |
Cambrian (C) (51)
| Cc - CAM, Conococheague Formation |
| Ce - CAM, Elbrook Formation |
| Cwy - CAM, Waynesboro Formation |
| Ct - CAM, Tomstown Dolomite |
| Ca - CAM, Antietam Formation |
| Ch - CAM, Harpers Formation |
| Cw - CAM, Weverton-Loudoun Formation |
Cambrian_or_Precambrian (CPCc) (52)
| CpCc -CAM or PRE, Catoctin Formation |
Water (Wa) (53)
| Wa, Major Water Body |
|