List of National Natural Landmarks in Washington

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From List of National Natural Landmarks, these are the National Natural Landmarks in Washington. There are 18 in total.

NameImageDateLocationCountyDescription
1Boulder Park and McNeil Canyon Haystack RocksGlacial-Drift-PB110031.JPG1986DouglasThe most illustrative examples of glacial erratics in the United States.
2Davis Canyon1986OkanoganOne of the largest and least disturbed examples of antelope bitterbrush-Idaho fescue shrub steppe remaining in the Columbia Plateau.
3Drumheller ChannelsDrumheller Channels1986Adams, GrantIllustrates the dramatic modification of the Columbia Plateau volcanic terrain by late Pleistocene catastrophic glacial outburst floods.
4Ginkgo Petrified ForestGinkgo Petrified Forest1965KittitasThousands of logs petrified in lava flows.
5Grand CouleeSteamboat Rock1965GrantAn illustration of a series of geological events.
6Grande Ronde Feeder Dikes1980AsotinThe best example of basalt dikes, the congealed feeder sources of the Columbia River basalt plateau.
7Grande Ronde Goosenecks1980AsotinA 1,500-foot (460 m) deep canyon that follows a tortuous path along meanders.
8The Great Gravel Bar of Moses Coulee1986DouglasLargest and best example of a pendent river bar formed by catastrophic glacial outburst floods that swept across the Columbia Plateau.
9Kahlotus Ridgetop2011FranklinThe best remaining example of the Central Palouse Prairie grassland subtheme.
10Mima MoundsMIMA MOUNDS.jpg1966ThurstonA prairie containing unusual soil pimples of black silt-gravel.
11Nisqually Delta1971Pierce, ThurstonAn unusually fine example of an estuarine ecosystem.
12Point of Arches1980ClallamAn outstanding exhibit of sea action in sculpturing a rocky shoreline
13Rose Creek Preserve1984WhitmanThe best remaining example of the aspen phase of the hawthorne-cow parsnip habitat type in the Columbia Plateau.
14Sims Corner Eskers and KamesYeager Rock1986DouglasThe best examples in the Columbia Plateau of landforms resulting from stagnation and rapid retreat of the ice sheet during the last glaciation.
15Steptoe and Kamiak ButtesSteptoe Butte1965WhitmanIsolated mountain peaks of older rock surrounded by basalt, rising above the surrounding lava plateau.
16Umtanum Ridge Water GapView from Umptanum Ridge1980KittitasIllustrates the geological processes of tectonic folding and antecedent stream cutting.
17Wallula GapWallula Gap1980Benton, Walla WallaThe largest and most spectacular of several large water gaps through basalt anticlines in the Columbia River basin.
18Withrow Moraine and Jameson Lake Drumlin FieldWithrow Moraine1980DouglasThe best examples of drumlins and the most illustrative segment of the only Pleistocene terminal moraine in the Columbia Plateau

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