Clarksburg topographic map

Average elevation: 436 ft

Average elevation: 331 ft

Average elevation: 374 ft

Average elevation: 384 ft

Average elevation: 276 ft

Average elevation: 456 ft

Average elevation: 358 ft

Average elevation: 381 ft

Average elevation: 436 ft

Average elevation: 702 ft

Average elevation: 581 ft

Average elevation: 456 ft

Average elevation: 568 ft

The rocks of the falls date to the late Precambrian and are about 750 million years old. The rocks are a resistant metamorphized schist, gneisses, metagraywackes, and metaconglomerates. The Falls formed the last time sea level dropped, during the Last Glacial Period about 35,000 years ago, causing the Potomac…

Average elevation: 240 ft

Seneca is located close to the intersection of River Road (Maryland Route 190), Seneca Road (Maryland route 112), and Rileys Lock Road, east of Great Seneca Creek and north of the Potomac River. The C&O Canal runs along the river, and Riley's Lock is the closest canal lock. The southern portion of Seneca Creek…

Average elevation: 269 ft

Average elevation: 440 ft

Average elevation: 417 ft

Average elevation: 305 ft

Average elevation: 351 ft

Average elevation: 446 ft

Average elevation: 364 ft

Average elevation: 456 ft

Average elevation: 315 ft

Average elevation: 341 ft

Average elevation: 482 ft

Average elevation: 279 ft

Average elevation: 302 ft

Average elevation: 469 ft

Average elevation: 374 ft

Average elevation: 269 ft

Average elevation: 318 ft

Average elevation: 305 ft

Average elevation: 420 ft