Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: 2014
Title: Airborne geophysical survey: Berwick '55
Online_Linkage:
Description:
Abstract:
Aeromagnetic data were collected along flight lines by instruments in an aircraft that recorded magnetic-field values and locations. In the earlier days of surveying, the only way to represent this data was to generate an analog map with contour lines. This dataset is a representation of the digitized contour lines either by following the lines or by choosing the intersection of the contour and flight-line to create a value of the magnetic field. The values presented are latitude, longitude, and map magnetic-field values.
Purpose:
Aeromagnetic surveys are used for geophysical prospecting. Some variations in magnetic measurements are caused by rocks that contain significant amounts of magnetic minerals (magnetite being the most common). These anomalies reflect variations in the amount and type of magnetic material and the shape and depth of the body of rock. The features and patterns of aeromagnetic anomalies can also be used to delineate details of subsurface geology including the locations of buried faults and the thickness of surficial sedimentary rocks.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 195509
Currentness_Reference: ground condition
Status:
Progress: complete
Maintenance_and_Update_Frequency: none planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -71.000671386719
East_Bounding_Coordinate: -70.747886657715
North_Bounding_Coordinate: 43.495971679688
South_Bounding_Coordinate: 43.256313323975
Keywords:
Theme:
Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:b84e5ef5-ec74-4ed1-a294-a0a7178d93a0
Theme:
Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: geophysics
Theme_Keyword: geospatial datasets
Theme_Keyword: magnetic field (earth)
Theme_Keyword: aeromagnetic surveying
Theme_Keyword: field monitoring stations
Place:
Place_Keyword_Thesaurus: Common Geographic Areas
Place_Keyword: f23031 = York
Place_Keyword: f33017 = Strafford
Access_Constraints: none
Use_Constraints: none
Browse_Graphic:
Browse_Graphic_File_Name:
Browse_Graphic_File_Description:
Reduced-size image depicting the data, 1118 x 1249 pixels, 125,009 bytes
Browse_Graphic_File_Type: JPEG