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  Image: Geographic Location Direction Photo #: ISS014-E-19807 Date: Apr. 2007
Geographic Region: CANADA-Q
Feature: MONTEREGION HILLS, AGR., GRANBY

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  ISS014-E-19807 (18 April 2007) --- Monteregian Hills, Quebec, Canada are featured in this image photographed by an Expedition 14 crewmember on the International Space Station. This view captures two striking patterns, pointed out by NASA scientists who study the shuttle and station photography. The circular features are the central members of the Monteregian Hills located to the east of Montreal--Mont St. Hilaire, Rougemont, and Mont Yamaska. The rectangular pattern records the intensive agricultural land use of the fertile lowlands in southern Quebec. The Monteregian Hills are an isolated series of roughly east-west trending plutons--masses of igneous rock that crystallized below the land surface--located near Montreal. According to the scientists, magmas forming the Hills were intruded into pre-existing sedimentary rocks during the Cretaceous Era (roughly 123-125 million years ago). Over time, the sedimentary rock has eroded away, leaving the more resistant igneous rock of the plutons exposed as the Monteregian Hills in the surrounding flat St. Lawrence Plains. Rocks of these three plutons record a transition from silica-poor magmas (little to no minerals such as quartz or feldspar) to silica-rich magmas (abundant quartz and feldspar) along the line of the Hills. Snow cover on the three mountains provides additional contrast with surrounding tan to brown fallow agricultural fields. The city of Granby, Quebec is visible at left. In addition to their interesting geology, the Monteregian Hills also serve as important woodland habitat "islands" in the greater Montreal urban area.




Monteregian Hills, Quebec, Canada:
This astronaut photograph of the area to the east of Montreal, Canada, captures two striking patterns. The circular features are the central members of a group of unusual rock formations known as the Monteregian Hills: Mont St. Hilaire, Rougemont, and Mont Yamaska. The rectangular pattern blanketing the landscape in the background reveals the intensive agriculture in the fertile lowlands in southern Quebec.

The Monteregian Hills are an isolated series of roughly east-west trending plutons, masses of igneous (formed from magma) rock that crystallized below the land surface. The magmas that form the Hills intruded into pre-existing sedimentary rocks roughly 125 to 123 million years ago, during the Cretaceous Era. Over time, the sedimentary rock has eroded away, leaving the more resistant igneous rock of the plutons exposed as the Monteregian Hills, standing over the surrounding, flat St. Lawrence Plains.

Snow cover on the three mountains provides contrast with surrounding fallow agricultural fields, which are shades of brown and tan. A bright white circle nestled on top of Mont St. Hillaire is snow-covered Lac Hertel (Hertel Lake). In addition to their interesting geology, the Monteregian Hills also serve as important woodland habitat "islands" in the greater Montreal urban area. Several small town and cities are visible in the image, appearing as purplish-gray patches. The largest in the scene is the city of Beloeil, straddling the Richelieu River west of Mont St. Hillaire.
 
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Images: All Available Images Low-Resolution 322k
Mission: ISS014  
Roll - Frame: E - 19807
Geographical Name: CANADA-Q  
Features: MONTEREGION HILLS, AGR., GRANBY  
Center Lat x Lon: 45.5N x 73W
Film Exposure:   N=Normal exposure, U=Under exposed, O=Over exposed, F=out of Focus
Percentage of Cloud Cover-CLDP: 10
 
Camera: E4
 
Camera Tilt: 10   LO=Low Oblique, HO=High Oblique, NV=Near Vertical
Camera Focal Length: 180  
 
Nadir to Photo Center Direction: W   The direction from the nadir to the center point, N=North, S=South, E=East, W=West
Stereo?:   Y=Yes there is an adjacent picture of the same area, N=No there isn't
Orbit Number: 141  
 
Date: 20070418   YYYYMMDD
Time: 215537   GMT HHMMSS
Nadir Lat: 45.4N  
Latitude of suborbital point of spacecraft
Nadir Lon: 72.5W  
Longitude of suborbital point of spacecraft
Sun Azimuth: 268   Clockwise angle in degrees from north to the sun measured at the nadir point
Space Craft Altitude: 171   nautical miles
Sun Elevation: 17   Angle in degrees between the horizon and the sun, measured at the nadir point
Land Views:  
Water Views: LAKE, RIVER  
Atmosphere Views:  
Man Made Views: AGRICULTURE, URBAN AREA  
City Views: GRANBY  
Photo is not associated with any sequences


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