Есть что улучшить? Предложите правку.
McAlester Pass Trail. Image from the NPS Geodiversity Atlas
North Cascades National Park Complex — North Cascades National Park, Ross Lake National Recreation Area and Lake Chelan National Recreation Area — lies along and near the Canadian border, about 160 km (100 mi) northeast of Seattle, in Chelan, Skagit and Whatcom counties, Washington.
| Established | October 2, 1968 |
| Size | about 276,928 hectares (684,305 acres) of wilderness |
| Layout | the national park's north and south units, with Ross Lake between them on the upper Skagit River, and Lake Chelan to the south in the Stehekin Valley |
| Landscape | alpine scenery, glaciated peaks, deep forested valleys, waterfalls, rivers and lakes, and diverse plants and animals, at the core of a vast mountain ecosystem with extreme ranges of climate and terrain |
| People | evidence of more than 9,000 years of human habitation at every elevation, showing adaptations to changing climates |
This page is part of the National Park Service's Geodiversity Atlas, a product of the Geologic Resources Inventory. Geodiversity means the whole range of a park's geologic and soil resources and processes — rocks, minerals, sediments, fossils, landforms and the processes that shape them — and the atlas supports education, geoconservation, and management that treats the living and non-living parts of an ecosystem together.
A collage of terranes
The complex's rocks span from the Precambrian (more than 540 million years ago) to the Holocene (the last 11.7 thousand years).
- Built from pieces. The mapped units form a collage of terranes — distinct bodies of rock, differing in origin and age, pressed against one another and separated by faults.
- Far-traveled. Fossils and paleomagnetic data show that some of these rock assemblages formed thousands of kilometers away and were slowly accreted — added by tectonics — to the western edge of North America.
- Still rising. The masses were thrust upward and faulted into a jumble of mountains. The bedrock is still being uplifted, by processes that began millions of years ago when the Juan de Fuca and North American plates collided.
The complex belongs to the Cascade-Sierra Mountains physiographic province and shares its geologic history and some of its formations with a region much larger than the park.
Maps, reports and data
Geologic map of North Cascades National Park Complex. Image from the NPS Geodiversity Atlas
The map's legend, in two parts. Images from the NPS Geodiversity Atlas
The Geologic Resources Inventory produces digital geologic maps and reports for more than 270 natural resource parks, and many products are still in progress:
| Product | What it is |
|---|---|
| Scoping summaries | records of meetings where park staff and local geologists set the mapping plan and the report's contents |
| Digital geologic maps | GIS files, a user guide and supporting map information; newer ones add Google Earth data and online map services |
| Reports | the park's setting and significance, notable features and processes, management issues, and geologic history, built on the maps |
| Posters | a PDF view of the GIS data; newer ones add aerial imagery or shaded relief. Included with the reports |
| Projects | the basics of the program and every product for a park |
- The complex's products are listed in the NPS DataStore.
- A Soil Resources Inventory for the park is complete and also in the DataStore.
Boats on Lake Chelan, part of the North Cascades complex. Image from the NPS Geodiversity Atlas
More: geologic formations · geologic activity · glaciers and glacial features · rivers and streams
Sources
Based on "NPS Geodiversity Atlas—North Cascades National Park, Washington," National Park Service; a work of the United States government in the public domain.
В изданияхNorth Cascades National Park
Лицензия: CC0 1.0 (общественное достояние) · По материалам www.nps.gov
1
0
0
0
Комментарии
