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0341 |aa|b7500000|dW1413000|eW0200000|fN0900000|gN0410000
040 |aCaOODSP|beng|erda|cCaOODSP
0410 |aeng|afre
043 |an-cn---
0861 |aM183-2/7799-PDF
1102 |aGeological Survey of Canada.|ecartographer, |eissuing body.
24510|aMagnetic anomaly map, Canada = |bCarte des anomalies magnétiques, Canada.
24611|aCarte des anomalies magnétiques, Canada
255 |aScale 1:7,500,000 ; |bLambert conformal conic projection |c(W 141°30'--W 20°00'/N 90°00'--N 41°00').
264 1|aOttawa, Ontario : |bGeological Survey of Canada = Commission géologique du Canada, |c2016.
264 4|c©2016
300 |a1 online resource (1 map) : |bcolour.
336 |acartographic image|bcri|2rdacontent
336 |atext|btxt|2rdacontent
337 |acomputer|bc|2rdamedia
338 |aonline resource|bcr|2rdacarrier
4901 |aOpen file = |aDossier public ; |v7799
500 |aRelief shown by shading.
500 |aIncludes text and inset map.
500 |a"Authors: W. Miles and D. Oneschuk."
500 |a"North American Datum, 1983."
504 |aIncludes bibliographical references.
5203 |a"The magnetic anomaly map of Canada shows small variations in the magnetic field that are caused largely by variations in the magnetic properties of Earth's crust. The magnetic character of a rock depends on its composition and its deformational and metamorphic history. To map these variations, the Geological Survey of Canada has been acquiring aeromagnetic data since 1947. Over the years, more than 500 surveys have been carried out, generally with a flight-line spacing of 800 m and an altitude of 305 m above the ground. These aeromagnetic surveys have been levelled to each other to correct for arbitrary datums, slow variations of Earth's magnetic field over time, and differing survey specifications. The dominant structural trends of geological provinces, truncation of those trends at structural boundaries, and the characteristic patterns of suture zones can be recognized on the magnetic anomaly map. The magnetic signature of Precambrian basement rocks can be seen through the Phanerozoic sedimentary basin cover. Major dyke swarms can be traced over hundreds of kilometres from their radiating linear magnetic pattern. Oceanic crust has a characteristic striped magnetic pattern that is due to changes in the polarity of Earth's magnetic field, which occur over intervals of millions of years"--Abstract.
546 |aText in English and French.
650 0|aMagnetic anomalies|zCanada|vMaps.
650 0|aGeomagnetism|zCanada|vMaps.
655 7|aGeological maps|2lcgft
655 7|aDigital maps|2lcgft
655 7|aMaps|2lcgft
7001 |aMiles, W. F., |eauthor.
7001 |aOneschuk, Douglas, |eauthor.
788 |tMagnetic anomaly map, Canada = |efre|w(CaOODSP)9.961032
830#0|aOpen file (Geological Survey of Canada)|v7799.|w(CaOODSP)9.832719
85640|qPDF|s21.90 MB|uhttps://publications.gc.ca/collections/collection_2026/rncan-nrcan/m183-2/M183-2-7799.pdf
8564 |qHTML|sN/A|uhttps://doi.org/10.4095/297337