Return to Earth From Space Home
Earth from Space logo Image Information Earth from Space logo

Display a Screen Layout for Printing

IMAGE: gray corner       IMAGE: gray corner
  Image: Geographic Location Direction Photo #: ISS063-E-88524 Date: Sep. 2020
Geographic Region: ARGENTINA

Ordering information for space photography
IMAGE: gray corner     IMAGE: gray corner

Image: gray corner     Image: gray corner
  View Low-Resolution Image  
  Lakes Pueyrredon and Posadas

An astronaut onboard the International Space Station shot this photograph of Lake Pueyrredon and Lake Posadas in the Patagonia region of southern Argentina. Snow-covered foothills of the Andes Mountains appear along the lower margin. Streaks on the lake surface are produced by the strong winds that are very common in the region. The dark shadow of a cloud falls on the surface of Lake Posadas. Though the permanent population is small, tourism brings many people to Patagonia's lake region; the small airstrip and lakeside road aid with arrivals.

Rivers from the local hills have dumped sediment on the shores of the lakes to form small deltas. Three are prominent on the shore of Lake Pueyrredon. (To the west in Chile, Lake Pueyrredon is known as Lake Cochrane.) Very strong and persistent winds have generated waves and currents powerful enough to erode sand from the toes of the fan-deltas, creating long, thin sand spits pointing down-current.

The biggest delta is connected to the opposite shore by a sand bar 3.5 kilometers (2.2 miles) long; it actually may be an ancient moraine. This sand bar cut off the eastern end of Lake Pueyrredon to form the smaller Lake Posadas. Posadas is lighter in color because of the light-toned sediment flowing into it from the incoming river.

Land surfaces here have been dynamic in the past one or two million years. Geologists now know that ice sheets that formed along the nearby Andes Mountains have expanded repeatedly, each time covering almost the entire area shown in the photo. Other astronaut photos such as this one show the Northern Patagonian ice sheet that affected Lake Pueyrredon.

Image: gray corner     Image: gray corner

Images: All Available Images Low-Resolution 480k
Mission: ISS063  
Roll - Frame: E - 88524
Geographical Name: ARGENTINA  
Center Lat x Lon: 47.4S x 71.9W
Film Exposure:   N=Normal exposure, U=Under exposed, O=Over exposed, F=out of Focus
Percentage of Cloud Cover-CLDP: 10
Camera: N8
Camera Tilt: 44   LO=Low Oblique, HO=High Oblique, NV=Near Vertical
Camera Focal Length: 800  
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:  
Date: 20200915   YYYYMMDD
Time: 182019   GMT HHMMSS
Nadir Lat: 47.2S  
Latitude of suborbital point of spacecraft
Nadir Lon: 68.2W  
Longitude of suborbital point of spacecraft
Sun Azimuth: 325   Clockwise angle in degrees from north to the sun measured at the nadir point
Space Craft Altitude: 229   nautical miles
Sun Elevation: 35   Angle in degrees between the horizon and the sun, measured at the nadir point
Land Views:  
Water Views:  
Atmosphere Views:  
Man Made Views:  
City Views:  
Photo is not associated with any sequences

NASA Human
Space Flight
Home Page
Home Page
Image eXchange
JSC Digital
Image Collection
Earth Science &
Remote Sensing

This service is provided by the International Space Station program and the JSC Earth Science & Remote Sensing Unit, ARES Division, Exploration Integration Science Directorate.
NASA meatball logo
ESRS logo