Hồ sụt Shenandoah Valley (Loại điển hình) – CEGL007858

Fully drawn-down western basin of Twin Pond in the Maple Flats sinkhole pond complex near Sherando Augusta County.  Needle spikerush (Eleocharis acicularis) dominates the pond center.  Glenwood-Pedlar Ranger District, George Washington & Jefferson National Forests. © DCR-DNH, Gary P. Fleming