| Locality | Latitude | Longitude | Distance | Bearing |
|---|
| Gibraltar, Birdsboro, Berks County, Pennsylvania, USA | 40° 17' 3" N | 75° 52' 18" W | 1.5km (1.0 miles) | |
| Dyer Quarry, Gibraltar, Birdsboro, Berks County, Pennsylvania, USA | 40° 16' 5" N | 75° 51' 29" W | 2.3km (1.4 miles) | |
| Neversink Mountain, Neversink Mountain Preserve, Reading, Berks County, Pennsylvania, USA | 40° 19' 18" N | 75° 53' 35" W | 4.9km (3.1 miles) | |
| Birdsboro, Berks County, Pennsylvania, USA | 40° 15' 51" N | 75° 48' 15" W | 5.0km (3.1 miles) | |
| Hay Creek, Birdsboro, Berks County, Pennsylvania, USA | 40° 14' 57" N | 75° 49' 17" W | 5.2km (3.2 miles) | |
| H&K Birdsboro Materials Quarry (Dyer Trap Rock Quarry; Hay Creek Trap Rock Quarry), Hay Creek, Birdsboro, Berks County, Pennsylvania, USA | 40° 14' 48" N | 75° 49' 5" W | 5.6km (3.5 miles) | |
| John P. Lance Mine, Neversink Mountain, Neversink Mountain Preserve, Reading, Berks County, Pennsylvania, USA | 40° 19' 31" N | 75° 54' 24" W | 6.0km (3.8 miles) | |
| Fritz Island Mines, Cumru Township, Berks County, Pennsylvania, USA | 40° 18' 20" N | 75° 55' 24" W | 6.2km (3.8 miles) | |
| Lower Alsace Township, Berks County, Pennsylvania, USA | 40° 20' 44" N | 75° 52' 22" W | 6.6km (4.1 miles) | |
| Peters Red Ochre Mine, Reading, Berks County, Pennsylvania, USA | 40° 19' 59" N | 75° 55' 0" W | 7.3km (4.5 miles) | |
| Antietam Reservoir, Lower Alsace Township, Berks County, Pennsylvania, USA | 40° 21' 20" N | 75° 52' 9" W | 7.6km (4.7 miles) | |
| Reading, Berks County, Pennsylvania, USA | 40° 19' 59" N | 75° 56' 0" W | 8.3km (5.2 miles) | |
| Cumru Township, Berks County, Pennsylvania, USA | 40° 17' 36" N | 75° 57' 15" W | 8.5km (5.3 miles) | |
| Oley Valley Quarry (Oley Stone Quarry; Eastern Industries Quarry), Oley Township, Berks County, Pennsylvania, USA | 40° 21' 0" N | 75° 47' 42" W | 8.5km (5.3 miles) | |
| Oley Township, Berks County, Pennsylvania, USA | 40° 22' 59" N | 75° 46' 14" W | 12.7km (7.9 miles) | |
| Jones Mine, Morgantown, Caernarvon Township, Berks County, Pennsylvania, USA | 40° 10' 20" N | 75° 50' 56" W | 12.9km (8.0 miles) | |
| Jones mine, Hopewell Mines, Warwick (Saint Marys), Warwick Township, Chester County, Pennsylvania, USA | 40° 10' 18" N | 75° 50' 49" W | 13.0km (8.1 miles) | |
| Muhlenberg Township, Berks County, Pennsylvania, USA | 40° 23' 32" N | 75° 55' 41" W | 13.1km (8.2 miles) | |
| Grace Mine, Morgantown, Berks County, Pennsylvania, USA | 40° 10' 15" N | 75° 52' 47" W | 13.2km (8.2 miles) | |
| Spring Township, Berks County, Pennsylvania, USA | 40° 21' 0" N | 75° 59' 29" W | 13.5km (8.4 miles) | |
| Hopewell mine, Hopewell Mines, Warwick (Saint Marys), Warwick Township, Chester County, Pennsylvania, USA | 40° 10' 13" N | 75° 47' 57" W | 13.9km (8.7 miles) | |
| Sinking Spring, Berks County, Pennsylvania, USA | 40° 19' 37" N | 76° 0' 39" W | 14.0km (8.7 miles) | |
| Hopewell Mines, Warwick (Saint Marys), Warwick Township, Chester County, Pennsylvania, USA | 40° 10' 12" N | 75° 47' 58" W | 14.0km (8.7 miles) | |
| Temple, Muhlenberg Township, Berks County, Pennsylvania, USA | 40° 24' 30" N | 75° 55' 18" W | 14.5km (9.0 miles) | |
| Warwick (Saint Marys), Warwick Township, Chester County, Pennsylvania, USA | 40° 9' 53" N | 75° 47' 2" W | 15.0km (9.3 miles) | |
| Morgantown, Caernarvon Township, Berks County, Pennsylvania, USA | 40° 9' 18" N | 75° 53' 24" W | 15.1km (9.4 miles) | |
| Morgantown, Berks County, Pennsylvania, USA | 40° 9' 18" N | 75° 53' 24" W | 15.1km (9.4 miles) | |
| Silver Hill Quarry, Bowmansville, Brecknock Township, Lancaster County, Pennsylvania, USA | 40° 11' 12" N | 75° 58' 37" W | 15.4km (9.6 miles) | |
| Trap Quarry, Saint Peters, Warwick Township, Chester County, Pennsylvania, USA | 40° 10' 59" N | 75° 43' 59" W | 15.6km (9.7 miles) | |
| Pennsylvania Uranium Mining Company Shaft, Shanesville, Earl Township, Berks County, Pennsylvania, USA | 40° 22' 15" N | 75° 42' 12" W | 15.8km (9.8 miles) | |
Dyer Quarry, Gibraltar, Birdsboro, Berks County, Pennsylvania, USA