| Locality | Latitude | Longitude | Distance | Bearing |
|---|
| Fry Quarry (Vetter Brothers; Inc.), Charles County, Maryland, USA | 38° 37' 45" N | 76° 53' 17" W | 4.0km (2.5 miles) | |
| Fort Washington, Prince Georges County, Maryland, USA | 38° 42' 39" N | 77° 2' 3" W | 15.0km (9.3 miles) | |
| Fort Foote, Prince Georges County, Maryland, USA | 38° 46' 9" N | 77° 0' 50" W | 19.6km (12.2 miles) | |
| Old Greensand-Diatomaceous Earth Pit, Calvert County, Maryland, USA | 38° 42' 33" N | 76° 41' 43" W | 22.9km (14.3 miles) | |
| Unnamed Clay deposits [1], Alexandria, Virginia, USA | 38° 47' 31" N | 77° 3' 11" W | 23.4km (14.5 miles) | |
| Dower House Road Plant, Prince Georges County, Maryland, USA | 38° 48' 37" N | 76° 50' 44" W | 23.6km (14.7 miles) | |
| Oxon Creek, Prince Georges County, Maryland, USA | 38° 48' 31" N | 77° 0' 48" W | 23.7km (14.7 miles) | |
| Kaylorite Corporation Greensand Pit, Calvert County, Maryland, USA | 38° 43' 17" N | 76° 41' 35" W | 23.8km (14.8 miles) | |
| Popes Creek, Charles County, Maryland, USA | 38° 23' 54" N | 76° 59' 25" W | 23.9km (14.8 miles) | |
| Wheeler Road, Oxon Hill, Prince Georges County, Maryland, USA | 38° 49' 49" N | 76° 58' 54" W | 25.3km (15.7 miles) | |
| Lyons Creek Diatomaceous Earth Deposit, Calvert County, Maryland, USA | 38° 44' 57" N | 76° 41' 4" W | 26.2km (16.3 miles) | |
| Clay Deposit (MRDS - 10067944), Fairfax County, Virginia, USA | 38° 41' 33" N | 77° 13' 9" W | 27.3km (16.9 miles) | |
| Quantico Slate Deposits, Fairfax County, Virginia, USA | 38° 41' 29" N | 77° 14' 45" W | 29.4km (18.3 miles) | |
| Wilson Molding Sand Pit, Anne Arundel County, Maryland, USA | 38° 43' 42" N | 76° 37' 10" W | 29.7km (18.5 miles) | |
| Occoquan Quarry (Occoquan Quarry Nos. 1 & 2), Fairfax County, Virginia, USA | 38° 40' 55" N | 77° 15' 14" W | 29.8km (18.5 miles) | |
| Graham-Virginia Granite Quarry (Mideast Div. Vulcan Materials Company), Fairfax County, Virginia, USA | 38° 41' 17" N | 77° 15' 36" W | 30.5km (19.0 miles) | |
| No. 2, Lorton, Fairfax County, Virginia, USA | 38° 41' 46" N | 77° 15' 44" W | 31.0km (19.2 miles) | |
| Agnewville Prospect, Gold-Pyrite Belt, Prince William County, Virginia, USA | 38° 38' 37" N | 77° 17' 21" W | 31.9km (19.8 miles) | |
| Crawford Placers Prospect (Neabsco Creek Prospect), Gold-Pyrite Belt, Prince William County, Virginia, USA | 38° 37' 26" N | 77° 18' 5" W | 32.8km (20.4 miles) | |
| Constitution Avenue, District of Columbia (Washington D.C.), USA | 38° 53' 33" N | 77° 1' 57" W | 33.1km (20.6 miles) | |
| Capitol Clay Products Company (West Brothers Brick Company), Prince Georges County, Maryland, USA | 38° 54' 32" N | 76° 54' 22" W | 33.6km (20.9 miles) | |
| Annandale, Fairfax County, Virginia, USA | 38° 49' 49" N | 77° 11' 46" W | 34.2km (21.3 miles) | |
| Annandale Quarry, Annandale, Fairfax County, Virginia, USA | 38° 50' 10" N | 77° 12' 57" W | 35.9km (22.3 miles) | |
| Bladensburg, Prince Georges County, Maryland, USA | 38° 55' 49" N | 76° 55' 40" W | 35.9km (22.3 miles) | |
| Waterworks tunnel, District of Columbia (Washington D.C.), USA | 38° 55' 27" N | 77° 1' 4" W | 36.2km (22.5 miles) | |
| Scientists Cliffs beach alluvials, Calvert County, Maryland, USA | 38° 31' 0" N | 76° 31' 0" W | 36.9km (22.9 miles) | |
| Cabin Branch Mine (Dumfries Mine), Dumfries, Gold-Pyrite Belt, Prince William County, Virginia, USA | 38° 34' 29" N | 77° 20' 54" W | 37.0km (23.0 miles) | |
| Falls Church, Fairfax County, Virginia, USA | 38° 52' 56" N | 77° 10' 15" W | 37.3km (23.2 miles) | |
| Gneiss outcrop, Rock Creek Park, NW Washington, District of Columbia (Washington D.C.), USA | 38° 56' 0" N | 77° 2' 58" W | 37.9km (23.5 miles) | |
| Piney branch, Rock Creek park, NW Washington, District of Columbia (Washington D.C.), USA | 38° 56' 13" N | 77° 2' 20" W | 38.0km (23.6 miles) | |
