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Various Cities in Eastern Canada and Northeastern USA – November 1st, 2010

44.1N 74W

November 1st, 2010 Category: Image of the day, Lakes, Rivers

USA and Canada - October 13th, 2010

This image shows portions of eastern Canada and the northeastern USA. The dark blue body of water by the left edge is part of Lake Ontario, on the border between the two countries. The series of long, thin, parallel lakes to the south of Lake Ontario are the Finger Lakes of New York State, USA.

Extending diagonally to the northeast from Lake Ontario is the Saint Lawrence River. It passes the cities of Montreal and Quebec City on its way to the Gulf of Saint Lawrence (not visible here). Another city, Ottawa can also be observed west of Montreal, on the Ottawa River, one of the Saint Lawrence’s tributaries.

Moving southeast to the coast of the USA, the cities of Boston, Providence and New York can be seen as well. Boston is situated on the coast above the hooked peninsula of Cape Cod; Providence is south of Boston by the shores of a series of bays, and part of New York city can be observed by Long Island at the center of the bottom edge.

“The Eye of Quebec”: Manicouagan Reservoir – May 28th, 2009

51.3N 68.6W

May 28th, 2009 Category: Image of the day, Lakes

Ottawa-Gatineau, Canada - May 6th, 2009

Ottawa-Gatineau, Canada - May 6th, 2009

Manicouagan Reservoir (also Lake Manicouagan) is a lake in central Quebec, Canada. Due to its distinctive ring shape, it is sometimes called “The Eye of Quebec”, and can be easily spotted just above the center of this image.

Manicouagan Reservoir, which covers an area of 1,942 km², has this annular shape because it lies within the remnants of an ancient eroded impact crater (astrobleme).

The crater was formed following the impact of an asteriod, whose diameter was 5 kilometres (3 miles). This asteriod excavated a crater originally about 100 km (62 mi) wide, although erosion and deposition of sediments have since reduced the visible diameter to about 72 km (45 mi). It is the fifth largest confirmed impact crater known on earth.