Matches in SemOpenAlex for { <https://semopenalex.org/work/W1567319478> ?p ?o ?g. }
- W1567319478 abstract "A program to study the engineering geology of most larger Alaska coastal communities and to evaluate their earthquake and other geologic hazards was started following the 1964 Alaska earthquake; this report about the Metlakatla area, Annette Island, is a product of that program. Field-study methods were of a reconnaissance nature, and thus the interpretations in the report are tentative. Landscape of the Metlakatla Peninsula, on which the city of Metlakatla is located, is characterized by a muskeg-covered terrane of very low relief. In contrast, most of the rest of Annette Island is composed of mountainous terrane with steep valleys and numerous lakes. During the Pleistocene Epoch the Metlakatla area was presumably covered by ice several times; glaciers smoothed the present Metlakatla Peninsula and deeply eroded valleys on the rest. of Annette Island. The last major deglaciation was completed probably before 10,000 years ago. Rebound of the earth's crust, believed to be related to glacial melting, has caused land emergence at Metlakatla of at least 50 ft (15 m) and probably more than 200 ft (61 m) relative to present sea level. Bedrock in the Metlakatla area is composed chiefly of hard metamorphic rocks: greenschist and greenstone with minor hornfels and schist. Strike and dip of beds are generally variable and minor offsets are common. Bedrock is of late Paleozoic to early Mesozoic age. Six types of surficial geologic materials of Quaternary age were recognized: firm diamicton, emerged shore, modern shore and delta, and alluvial deposits, very soft muskeg and other organic deposits, and firm to soft artificial fill. A combination map unit is composed of bedrock or diamicton. Geologic structure in southeastern Alaska is complex because, since at least early Paleozoic time, there have been several cycles of tectonic deformation that affected different parts of the region. Southeastern Alaska is transected by numerous faults and possible faults that attest to major movements of the earth's crust. The latest of the major tectonic events in the Metlakatla region occurred in middle Tertiary time; some minor fault activity probably continues today at depth. Along the outer coast of southeastern Alaska and British Columbia, major faulting activity occurs in the form of active, strike-slip movement along the Queen Charlotte fault about 100 mi (160 kin) west-southwest of Metlakatla. Some branching subsidiary faults also may be active, at least one of which may be the Sandspit fault. Many major and smaller earthquakes occur along the outer coast. These shocks are related to movements along the Queen Charlotte fault. A few small earthquakes occur in the region between the outer coast and the Coast Mountains, which includes Metlakatla. 0nly a few earthquakes have been reported as felt at Metlakatla; these shocks and others felt in the region are tabulated. Historically, the closest major earthquake was the magnitude 8.1 Queen Charlotte Islands earthquake of August 22, 1949, which occurred along the Queen Charlotte fault 125 mi (200 km) southwest of Metlakatla. No damage was reported at Metlakatla. The probability of destructive earthquakes affecting Metlakatla is unknown. A consideration of the tectonics and earthquake history of the region, however, suggests that sometime in the future an earthquake with a magnitude of about 8 will occur along that segment of the Queen Charlotte fault nearest to Metlakatla. Smaller earthquakes with magnitudes of 6 or more might occur elsewhere in the Metlakatla region or south-southeastward near Dixon Entrance or Hecate Strait. Several geologic effects that have characterized large earthquakes elsewh6re may be expected to accompany some of the possible major earthquakes that might affect the Metlakatla area in the future. Evaluation of effects indicates that fault displacement and tectonic uplift or subsidence are probably unlikely, and ground shaking in general probably would be strongest" @default.
- W1567319478 created "2016-06-24" @default.
- W1567319478 creator A5090621296 @default.
- W1567319478 date "1977-01-01" @default.
- W1567319478 modified "2023-09-26" @default.
- W1567319478 title "Reconnaissance engineering geology of the Metlakatla area, Annette Island, Alaska, with emphasis on evaluation of earthquakes and other geologic hazards" @default.
- W1567319478 cites W143308189 @default.
- W1567319478 cites W1479693811 @default.
- W1567319478 cites W1490718145 @default.
- W1567319478 cites W1504703354 @default.
- W1567319478 cites W1533313085 @default.
- W1567319478 cites W1554116413 @default.
- W1567319478 cites W1566632557 @default.
- W1567319478 cites W1573070214 @default.
- W1567319478 cites W1580361741 @default.
- W1567319478 cites W1584456614 @default.
- W1567319478 cites W1586406374 @default.
- W1567319478 cites W1610752462 @default.
- W1567319478 cites W174560616 @default.
- W1567319478 cites W178818838 @default.
- W1567319478 cites W1836771680 @default.
- W1567319478 cites W1865918832 @default.
- W1567319478 cites W1924999100 @default.
- W1567319478 cites W193997632 @default.
- W1567319478 cites W1967993402 @default.
- W1567319478 cites W1971175023 @default.
- W1567319478 cites W1971889384 @default.
- W1567319478 cites W1976968804 @default.
- W1567319478 cites W1984541315 @default.
- W1567319478 cites W1986825850 @default.
- W1567319478 cites W1999985970 @default.
- W1567319478 cites W2004529964 @default.
- W1567319478 cites W2018933348 @default.
- W1567319478 cites W2024953052 @default.
- W1567319478 cites W2033304178 @default.
- W1567319478 cites W2043546840 @default.
- W1567319478 cites W2050104025 @default.
- W1567319478 cites W2053993445 @default.
- W1567319478 cites W2084808852 @default.
- W1567319478 cites W2085856636 @default.
- W1567319478 cites W2089850899 @default.
- W1567319478 cites W2108943598 @default.
- W1567319478 cites W2110603116 @default.
- W1567319478 cites W2115931168 @default.
- W1567319478 cites W2138058376 @default.
- W1567319478 cites W2142659790 @default.
- W1567319478 cites W2177176396 @default.
- W1567319478 cites W2201680948 @default.
- W1567319478 cites W2241748382 @default.
- W1567319478 cites W2270776088 @default.
- W1567319478 cites W2299616961 @default.
- W1567319478 cites W2312420999 @default.
- W1567319478 cites W2312689806 @default.
- W1567319478 cites W2313846310 @default.
- W1567319478 cites W2333052970 @default.
- W1567319478 cites W2601028335 @default.
- W1567319478 cites W2900489189 @default.
- W1567319478 cites W2900804299 @default.
- W1567319478 cites W2900922237 @default.
- W1567319478 cites W2908733819 @default.
- W1567319478 cites W2909826451 @default.
- W1567319478 cites W2915987600 @default.
- W1567319478 cites W2998153804 @default.
- W1567319478 cites W3121941916 @default.
- W1567319478 cites W327862931 @default.
- W1567319478 cites W35359914 @default.
- W1567319478 cites W4518447 @default.
- W1567319478 cites W46900439 @default.
- W1567319478 cites W587272905 @default.
- W1567319478 cites W627233917 @default.
- W1567319478 cites W646160422 @default.
- W1567319478 cites W64760061 @default.
- W1567319478 cites W80934259 @default.
- W1567319478 cites W90345813 @default.
- W1567319478 cites W91115468 @default.
- W1567319478 cites W981214645 @default.
- W1567319478 doi "https://doi.org/10.3133/ofr77272" @default.
- W1567319478 hasPublicationYear "1977" @default.
- W1567319478 type Work @default.
- W1567319478 sameAs 1567319478 @default.
- W1567319478 citedByCount "0" @default.
- W1567319478 crossrefType "journal-article" @default.
- W1567319478 hasAuthorship W1567319478A5090621296 @default.
- W1567319478 hasBestOaLocation W15673194781 @default.
- W1567319478 hasConcept C114793014 @default.
- W1567319478 hasConcept C127313418 @default.
- W1567319478 hasConcept C137527640 @default.
- W1567319478 hasConcept C150999391 @default.
- W1567319478 hasConcept C151730666 @default.
- W1567319478 hasConcept C15739521 @default.
- W1567319478 hasConcept C15785411 @default.
- W1567319478 hasConcept C160464908 @default.
- W1567319478 hasConcept C17409809 @default.
- W1567319478 hasConcept C180705331 @default.
- W1567319478 hasConcept C77928131 @default.
- W1567319478 hasConceptScore W1567319478C114793014 @default.
- W1567319478 hasConceptScore W1567319478C127313418 @default.
- W1567319478 hasConceptScore W1567319478C137527640 @default.
- W1567319478 hasConceptScore W1567319478C150999391 @default.
- W1567319478 hasConceptScore W1567319478C151730666 @default.