Field Guides

New River Gorge NP – Sandstone Falls

Sandstone Falls Sandstone Falls forms where the New River flows across resistant sandstone layers that create a series of cascades and channels. Variations in rock hardness influence the shape and flow of water across the riverbed, producing broad falls rather than a single vertical drop. The waterfall demonstrates how geological structure affects river behavior. The […]

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Cumberland Gap NHS – Gap Cave

Cumberland Gap Cave Cumberland Gap Cave developed through the gradual dissolution of limestone bedrock by slightly acidic groundwater. Over long periods of time, water expanded fractures in the rock, forming underground passages and chambers. These karst processes created cave systems commonly found throughout the Appalachian region. Cave environments provide insight into geological conditions that shaped […]

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Isle Royale NP

Isle Royale National Park Isle Royale National Park protects a remote island archipelago located in Lake Superior and represents one of the most isolated national parks in the contiguous United States. Accessible primarily by ferry or seaplane, the park preserves a largely undeveloped wilderness characterized by forested ridges, inland lakes, and rocky shoreline landscapes. Its […]

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Keweenaw National Historical Park

Keweenaw National Historical Park Keweenaw National Historical Park preserves the history of copper mining that helped drive industrial growth in the United States during the nineteenth and early twentieth centuries. Located on Michigan’s Keweenaw Peninsula, the park reflects the technological innovation and labor required to extract copper from one of the richest deposits in North […]

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Gates of the Arctic NP – Anaktuvuk Pass

Anaktuvuk Pass – Gates of the Arctic National Park and Preserve Anaktuvuk Pass is located within the Brooks Range and represents an important historic travel corridor through mountainous Arctic terrain. The pass has long served as a seasonal migration route for caribou and as a travel route for Indigenous communities whose subsistence traditions depend on […]

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Gates of the Arctic NP – Bettles

Bettles – Gates of the Arctic National Park and Preserve Bettles serves as one of the primary gateway communities for access to Gates of the Arctic National Park and Preserve. Located along the Koyukuk River north of the Arctic Circle, the settlement developed as a transportation and supply point for exploration and resource activity in […]

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Gates of the Arctic NP – Lake Nutuvuki

Lake Nutuvukti – Gates of the Arctic National Park and Preserve Lake Nutuvukti lies within the remote interior of Gates of the Arctic National Park and Preserve and reflects the expansive tundra and mountain landscapes characteristic of the Brooks Range region. Surrounded by broad valleys and glacially shaped terrain, the lake represents the type of […]

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Kobuk Valley NP – Onion Portage and River Exploration

Onion Portage – Kobuk Valley National Park Onion Portage represents one of the most significant archaeological sites in Arctic Alaska and preserves evidence of human activity spanning thousands of years. Located along the Kobuk River, the site reflects a traditional crossing point used by migrating caribou herds and Indigenous communities who depended on these seasonal […]

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Kobuk Valley NP – Sand Dunes

Kobuk Valley Sand Dunes – Kobuk Valley National Park The sand dunes of Kobuk Valley National Park form one of the most unexpected landscapes in the Arctic region. Located north of the Arctic Circle, these expansive dune fields were created by glacial processes that deposited sand later shaped by wind activity. The dunes represent a […]

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Kobuk Valley NP – Ambler

Ambler – Kobuk Valley National Park Ambler is a small community located near the southern boundary of Kobuk Valley National Park and serves as a regional access point for remote wilderness landscapes along the Kobuk River. The settlement reflects long-standing Indigenous traditions associated with seasonal migration, fishing, and subsistence practices shaped by the environmental conditions […]

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