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Notes on video lecture:
Examining the Agpalilik Meteorite
Notes taken by Edward Tanguay on November 16, 2014 (go to class or lectures)
Choose from these words to fill the blanks below:
million, inclusions, Buchwald, crystal, slowly, Greenland, impossible, troilite, salt, elongated, pattern, earth, coming, iron, crystal, crystallized, heavier, cooled, 600, meteorite, Moon, gravity, metal, 550, 300, kilometers, liquid
the largest slice in the world
kilo slab
found in 1963 in northern
found by Vagn
wrote a 2,500 page book describing every meteorite known on the planet
has a structure
formed from when the iron core of the asteroid from which this meteorite came 4.5 billion years ago
you can see how slowly the core
30 degrees per one years
therefore it's to duplicate this material, you can't make fake iron meteorites
we don't have the time to cool something so
the meteorite is uniformly a
you see the same crystal all across the surface
theoretically, uniform crystals of this kind could be wide
elongated, dark
this is , an iron sulfide mineral
can be found as a native mineral on Earth, but is more abundant in meteorites, in particular those originating from the and Mars
they could not fit into the structure
it is similar to when you freeze water, the salt will concentrate in the remaining which will get more and more salty and you will have to cool it at lower temperatures to make this remaining salt water freeze
so the features are the last portion of the melt that remained
there are little crystals in the troilite areas which were a little than the liquid
this 10-kilometer-in-diameter asteroid had its own field, of course pointed toward its center, this meteorite was just a fragment of it
the astroid that this meteorite came from collided with another asteroid some million years ago
the fragments from the collision are still raining down on the
it's the most common type of iron meteorite we have today
we have pieces of the collision which have hit the earth within the last few thousand years and they keep
Spelling Corrections:
meterorite ⇒ meteorite
astroid ⇒ asteroid
Ideas and Concepts:
On the uniqueness of iron meteorites, via tonight's Origin of the Universe class: "The crystal structure of this meteorite formed from when the iron core of the asteroid from which it came began crystallizing 4.5 billion years ago. You can see how slowly the core cooled, 30 degrees per one million years. It's impossible to duplicate this material, you wouldn't have the time. You can't fake an iron meteorite."