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- Gastineau_Channel abstract "Gastineau Channel is a channel between the mainland of the U.S. state of Alaska and Douglas Island in the Alexander Archipelago of southeastern Alaska. It separates Juneau on the mainland side from Douglas (now part of Juneau), on Douglas Island. The first European to sight the channel was Joseph Whidbey early in August 1794, first from the south and later from the west. It was probably named for John Gastineau, an English Civil Engineer and Surveyor.The channel is navigable by large ships only from the southeast as far as the Juneau-Douglas Bridge, approximately 9.7 miles (15.6 km). Between the bridge and Juneau International Airport, approximately 8.1 miles (13.0 km), it is navigable only by smaller craft and only at high tide.The channel is becoming increasingly unnavigable due to shallow water depths. The two principal causes for this are: Isostatic rebound following the retreat of glacial ice sheets Sedimentation and infilling of the Gastineau Channel by silty sediment produced by the Mendenhall Glacier and Mendenhall River.If current trends continue, Gastineau Channel may eventually become dry or unnavigable or both. During isostatic rebound, the Earth’s lithosphere (crust) is slowly rising due to buoyant forces, following the removal of a large mass on the surface. This can be likened to an ice cube floating in a glass of water with a penny sitting on top. The weight of the penny makes the ice cube float lower, similar to the immense weight of a glacier on top of the lithosphere. When the penny (glacier) is removed, the ice cube (lithosphere) “rebounds” and floats slightly higher. In the geologic case, this scenario happens very slowly. Rates of isostatic rebound throughout SE Alaska vary from 0.1 to 1.5 inches/year depending on glacial history. The approximate rebound rate in the Juneau area is 0.25 to 0.5 inches/year.".
- Gastineau_Channel thumbnail Gastineau_channel_17744.jpg?width=300.
- Gastineau_Channel wikiPageID "958641".
- Gastineau_Channel wikiPageRevisionID "591414234".
- Gastineau_Channel hasPhotoCollection Gastineau_Channel.
- Gastineau_Channel subject Category:Landforms_of_Juneau_City_and_Borough,_Alaska.
- Gastineau_Channel subject Category:Straits_of_Alaska.
- Gastineau_Channel point "58.295 -134.40722222222223".
- Gastineau_Channel type BodyOfWater109225146.
- Gastineau_Channel type Channel109241247.
- Gastineau_Channel type PhysicalEntity100001930.
- Gastineau_Channel type Strait109446115.
- Gastineau_Channel type StraitsOfAlaska.
- Gastineau_Channel type Thing100002452.
- Gastineau_Channel type YagoGeoEntity.
- Gastineau_Channel type YagoPermanentlyLocatedEntity.
- Gastineau_Channel type BodyOfWater.
- Gastineau_Channel type NaturalPlace.
- Gastineau_Channel type Place.
- Gastineau_Channel type River.
- Gastineau_Channel type Stream.
- Gastineau_Channel type Wikidata:Q532.
- Gastineau_Channel type BodyOfWater.
- Gastineau_Channel type Place.
- Gastineau_Channel type RiverBodyOfWater.
- Gastineau_Channel type Location.
- Gastineau_Channel type SpatialThing.
- Gastineau_Channel comment "Gastineau Channel is a channel between the mainland of the U.S. state of Alaska and Douglas Island in the Alexander Archipelago of southeastern Alaska. It separates Juneau on the mainland side from Douglas (now part of Juneau), on Douglas Island. The first European to sight the channel was Joseph Whidbey early in August 1794, first from the south and later from the west.".
- Gastineau_Channel label "Détroit de Gastineau".
- Gastineau_Channel label "Gastineau Channel".
- Gastineau_Channel label "Gastineau Channel".
- Gastineau_Channel sameAs Gastineau_Channel.
- Gastineau_Channel sameAs Détroit_de_Gastineau.
- Gastineau_Channel sameAs m.03tdyh.
- Gastineau_Channel sameAs 5846567.
- Gastineau_Channel sameAs Q1495538.
- Gastineau_Channel sameAs Q1495538.
- Gastineau_Channel sameAs Gastineau_Channel.
- Gastineau_Channel lat "58.295".
- Gastineau_Channel long "-134.40722222222223".
- Gastineau_Channel wasDerivedFrom Gastineau_Channel?oldid=591414234.
- Gastineau_Channel depiction Gastineau_channel_17744.jpg.
- Gastineau_Channel isPrimaryTopicOf Gastineau_Channel.