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which 250 feet (76 m) rises above the water level and 100 feet (30 m) is beneath the water surface. Like many glaciers it contains moraines which appear as dark areas composed of dirt, stones and larger rocks mixed in with the ice and transported downstream to eventually be ejected from the glacier's terminus. The glacial ice appears blue as a result of the absorption of red, orange, yellow and green wavelengths of light and, consequently, pools of
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glacier calves it makes sounds similar to gunshots from the cracking of the ice and the release of trapped air, then a roaring boom as the ice tumbles down into the sea. Freshwater upwellings emerge from the central area of the glacier's terminus, generated by meltwater streams running underneath the glacier. Such areas attract sea birds which feed on the fish that can be found there.
301:
inch (2.5 cm) per day until 1998 when some degree of recession was recorded as the northern part of the terminus formed a small embayment, while the southern part continued advancing at 1 foot (0.30 m) per year. In the 1990s, Margerie
Glacier was attached to the Grand Pacific Glacier; however, it has since detached from the Grand Pacific which is receding, with debris from a
368:
Margerie
Glacier is a part of the Glacier Bay National Park and Preserve which—with its combination of tidewater glaciers, coastlines, fjords, rivers and lakes—provides widely varying landscapes and seascapes that support 333 vascular plant taxa, 274 bird species, 160 fish species, 41 mammal species,
300:
epoch. About 1750, the Little Ice Age reached its maximum stage and a general recession of glaciers began. Ice flows have been recorded at
Margerie Glacier at 2,000 feet (610 m) per year or 6 feet (1.8 m) per day. The advance was reduced to a rate of 30 feet (9.1 m) per year or about 1
243:
Margerie
Glacier extends upstream for a length of 21 miles (34 km) from Tarr Inlet to its source on the southern slopes of Mount Root. The width of the glacier is about 1 mile (1.6 km) and the total height at its terminus is about 350 feet (110 m) including 100 feet (30 m) that is
284:
first visited the bay in 1879 the ice had retreated 48 miles (77 km) into the bay. The ice wall has since retreated 65 miles (105 km) from the mouth of the bay and is only a remnant of the massive glacier seen by
Vancouver. The bay now contains eight tidewater glaciers, including Margerie,
329:
coastal area of the park. A tidewater glacier is one whose terminus encounters seawater at least at high tide, if not at all tide levels. Margerie
Glacier and six other glaciers have termini that are fully submerged at all tide levels. Margerie Glacier has a total height of 350 feet (110 m) of
334:
on top of the glacier will appear bright blue. Margerie
Glacier is a much cleaner glacier with less debris compared to the Grand Pacific Glacier located adjacent to Margerie's northeastern flank. It is also one of the most active glaciers for ice calving along with the Johns Hopkins Glacier. As a
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Glacier Bay and its many glaciers are approachable only by air and water as there are no roads in the park. The steep drop off of
Margerie Glacier terminus allows cruise ships and smaller park tour boats to anchor nearby providing close-up views of
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231:
in Tarr Inlet. Margerie
Glacier is one of the most active and frequently-visited glaciers in Glacier Bay, which was declared a National Monument in 1925, a National Park and Preserve in 1980, a UNESCO World Biosphere Reserve in 1986 and a
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In 1750, Glacier Bay was a massive single glacier but due to higher average temperatures and lower average snowfall amounts over the last several centuries it has been transformed into what is now a 65 miles (105 km)
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In a study of the bedrock geology and mineral resources of
Glacier Bay, out of 17 areas classified as containing mineral deposits, Margerie Glacier has been identified as containing
236:
in 1992. While most of the tidewater glaciers in the park have been receding over the last several decades, Margerie Glacier has become stable, neither growing nor receding, while
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with many smaller glaciers. Margerie Glacier is located at the extreme northwestern end of the bay and is situated perpendicular to the
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Margerie Glacier is categorized as a tidewater glacier, one of eleven remaining in the park, with eight in the bay and three on the
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292:—that began about 4,000 years ago. This advance is not comparable to continental glaciation that occurred during the
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and his expedition were stopped by a wall of ice 20 miles (32 km) wide and 4,000 feet (1,200 m) high. When
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393:, which are colonies of mosses which move across the glacier over time, due to forces that are not well understood.
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are also sometimes seen near this glacier. Studies have been performed on Margerie Glacier on
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858:. Glacier Bay National Park and Preserve. 23–26 September 1883. p. 22. Archived from
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who visited the area in 1913. Glacier Bay was completely covered by ice in 1794 when
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border flowing southeast down the valley, then turning to the northeast toward its
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nest in the rocks of Margerie Glacier. As this glacier calves, it disturbs the
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853:"The Scientific Adventure: Proceedings of the First Glacier Bay Symposium"
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The glaciers in Glacier Bay are remnants of a general ice advance—the
723:. National Park Service, Alaska System Support Office. Archived from
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Layers of rock debris are mixed with ice at the sides of the terminus
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Margerie Glacier is named after French geologist and geographer
718:"Glacier Bay National Park and Reserve Historic Resource Study"
524:
The Cruiser Friendly Onboard Guide to Alaska's Inside Passage
381:
and small fish, thus making it an ideal spot for birds.
884:"Herd Of Fuzzy Green 'Glacier Mice' Baffles Scientists"
573:. National park Service. pp. 1–4. Archived from
793:. National Park Service. 2016-01-16. Archived from
754:. National Park Service. 2010-01-01. Archived from
691:. National Park Service. 2016-01-15. Archived from
654:. National Park Service. 2016-01-15. Archived from
629:. National Park Service. 2016-01-15. Archived from
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568:"An Overview of Selected Glaciers in Glacier Bay"
219:, elevation 12,860 feet (3,920 m), on the
215:. The glacier begins on the southern slopes of
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672:
951:Glaciers of Hoonah–Angoon Census Area, Alaska
931:Flash Earth satellite map of Margerie Glacier
911:Glacier Bay National Park (official NPS site)
527:. Cruiser Friendly Guides. pp. 123–127.
305:left behind in the gap between the glaciers.
188:Map of Glacier Bay National Park and Preserve
16:Glacier in Glacier Bay, Alaska, United States
8:
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195:is a 21 mi (34 km) long tidewater
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285:within small inlets along its perimeter.
921:Fairweather range climbing history (NPS)
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467:United States Department of the Interior
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956:Glaciers of Unorganized Borough, Alaska
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604:. National Park Service. Archived from
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493:. National Park Service. Archived from
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408:Glacier Bay National Park and Preserve
213:Glacier Bay National Park and Preserve
7:
458:Geographic Names Information System
752:"Glaciers with Water Termini 2010"
14:
822:. Lakeside Publishing Co. 1990.
369:and 3 amphibian species. Arctic
347:
50:
43:
27:
463:United States Geological Survey
488:"Glacier Bay- 2015 Fact Sheet"
77:Tidewater — constrained valley
1:
791:"Glaciers / Glacial Features"
432:Margerie Glacier aerial view
521:Breen, Terry (2006-06-30).
972:
211:within the boundaries of
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87:Glacier Bay National Park
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26:
816:"Cruise Travel Apr 1990"
278:Captain George Vancouver
716:Kurtz, Rick S. (1995).
820:Cruise Travel Magazine
433:
322:
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128:58.96778°N 137.17583°W
926:Glacier Bay Map (NPS)
652:"History and Culture"
431:
413:Grand Pacific Glacier
316:
254:Grand Pacific Glacier
238:Johns Hopkins Glacier
187:
155:350 feet (110 m)
147:21 miles (34 km)
274:Emmanuel de Margerie
133:58.96778; -137.17583
317:Ice chunk calving (
234:World Heritage Site
124: /
946:Glaciers of Alaska
916:Glacier info (NPS)
566:Daniel E. Lawson.
453:"Margerie Glacier"
434:
323:
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64:Location in Alaska
418:Fairweather Range
319:calving animation
294:Wisconsin Ice Age
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193:Margerie Glacier
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905:External links
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602:"Glacier Bay"
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892:. Retrieved
890:. 2020-05-09
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867:. Retrieved
860:the original
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836:. Retrieved
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799:. Retrieved
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606:the original
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391:glacier mice
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244:underwater.
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423:Mount Forde
403:Glacier Bay
298:Pleistocene
262:ice calving
201:Glacier Bay
131: /
119:137°10′33″W
106:Coordinates
95:Glacier Bay
940:Categories
894:2020-05-25
869:2016-01-15
838:2016-01-15
801:2016-01-16
762:2016-01-15
734:2016-01-15
699:2016-01-15
662:2016-01-15
637:2016-01-15
612:2016-01-15
584:2016-01-15
545:2016-01-16
534:0978766105
504:2016-01-13
437:References
342:deposits.
217:Mount Root
116:58°58′04″N
91:Mount Root
828:0199-5111
332:meltwater
282:John Muir
163:Sea level
152:Thickness
689:"Nature"
397:See also
309:Features
229:terminus
160:Terminus
83:Location
303:moraine
296:of the
268:History
197:glacier
826:
531:
340:copper
225:Canada
221:Alaska
205:Alaska
171:Stable
168:Status
144:Length
99:Alaska
863:(PDF)
856:(PDF)
728:(PDF)
721:(PDF)
578:(PDF)
571:(PDF)
498:(PDF)
491:(PDF)
379:krill
375:gulls
371:terns
250:fjord
824:ISSN
529:ISBN
385:and
373:and
73:Type
888:NPR
199:in
93:to
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886:.
818:.
780:^
743:^
708:^
671:^
593:^
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461:.
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444:^
264:.
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841:.
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615:.
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469:.
321:)
223:–
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
