Tuesday, June 26, 2012

Tectonic Plates

Wiki says:
This is a list of tectonic plates on Earth. Tectonic plates are pieces of the Earth's crust and uppermost mantle, together referred to as the lithosphere. The plates are around 100 km (62 mi) thick and consist of two principal types of material: oceanic crust (also called sima from silicon and magnesium) and continental crust (sial from silicon and aluminium). The composition of the two types of crust differs markedly, with basaltic rocks ("mafic") dominating oceanic crust, while continental crust consists principally of lower density granitic rocks ("felsic").

The following tectonic plates currently exist on the Earth's surface with roughly definable boundaries.

Primary plates

These seven plates comprise the bulk of the seven continents and the Pacific Ocean.

African Plate
Antarctic Plate
Eurasian Plate
Indo-Australian Plate
North American Plate
Pacific Plate
South American Plate

Secondary plates

These smaller plates are generally shown on major plate maps, but with the exception of the Arabian and Indian plates do not comprise significant land area.

Arabian Plate
Caribbean Plate
Cocos Plate
Indian Plate
Juan de Fuca Plate
Nazca Plate
Philippine Sea Plate
Scotia Plate

There are a whole bunch of Tertiary Plates which are identified in various ways, which include the remains of older tectonic plates... I am buried under some quaternary plate of the imagination or other...

Tectonic Plates

The subduction zones
have pushed me under your form
and tamped me down in
the heated steamy
places, magnetic magma
cooking my old soul
as if I could take
this one more time, raising Cain
yet again, raising
him above the world
in all rebellion after
all this freaking time.

April 18, 2010 11:20 AM

1 comment:

  1. raising cain after all this time.
    what a great line.
    and it's wrapped up in a wonderful poem,too.


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