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plate
Plate tectonics (from the Late Latin tectonicus, from the Greek: τεκτονικός "pertaining to building") is a scientific theory describing the large-scale motion of 7 large plates and the movements of a larger number of smaller plates of the Earth's lithosphere, over the last hundreds of millions of years. The theoretical model builds on the concept of continental drift developed during the first few decades of the 20th century. The geoscientific community accepted plate-tectonic theory after seafloor spreading was validated in the late 1950s and early 1960s.
The lithosphere, which is the rigid outermost shell of a planet (the crust and upper mantle), is broken up into tectonic plates. The Earth's lithosphere is composed of seven or eight major plates (depending on how they are defined) and many minor plates. Where the plates meet, their relative motion determines the type of boundary: convergent, divergent, or transform. Earthquakes, volcanic activity, mountain-building, and oceanic trench formation occur along these plate boundaries. The relative movement of the plates typically ranges from zero to 100 mm annually.
Tectonic plates are composed of oceanic lithosphere and thicker continental lithosphere, each topped by its own kind of crust. Along convergent boundaries, subduction carries plates into the mantle; the material lost is roughly balanced by the formation of new (oceanic) crust along divergent margins by seafloor spreading. In this way, the total surface of the lithosphere remains the same. This prediction of plate tectonics is also referred to as the conveyor belt principle. Earlier theories, since disproven, proposed gradual shrinking (contraction) or gradual expansion of the globe.
Tectonic plates are able to move because the Earth's lithosphere has greater strength than the underlying asthenosphere. Lateral density variations in the mantle result in convection. Plate movement is thought to be driven by a combination of the motion of the seafloor away from the spreading ridge (due to variations in topography and density of the crust, which result in differences in gravitational forces) and drag, with downward suction, at the subduction zones. Another explanation lies in the different forces generated by tidal forces of the Sun and Moon. The relative importance of each of these factors and their relationship to each other is unclear, and still the subject of much debate.
Brand new with tags. Only taken out of plastic for pic.
Surefire warcomp 1/2×28 5.56 +cash tbd Trade value $200.
Let me know what you have. Let's work something out
Howdy -
Looking to find a new home for my plate carrier. Black in color, excellent condition. Worn for one range session, worked great but just a little too small for me (6’ 2”, 250 lbs), so replacing with something slightly larger. $75 new, looking for $60 obo. Would trade for factory 9mm...
I have a Operator II Plate carrier from Ar500. Only been worn once, in new condition. (does not include plates) These go for $129 on their website, asking $110(includes shipping).
For sale is a Tactical Assault Gear plate carrier in multicam. Has been worn through a few training classes and many trips to the range. Still in great shape. Stitching still intact, no rips and no tears.
Adjustable plate pockets. Will accommodate side plates. Has elastic cummerbund and heavily...
im looking to sell my plate carrier, it is a 511 tactec.( 5.11 TacTec™ Plate Carrier | 5.11 Tactical ). it is in really good condition and comes with lvl 3a plates frint and back, pouches for 2 ar mags and 2 pistol mags, plus a couple random pouches.
$500.00
I have a never used Tactical Tailor TTRAC Plate Carrier for sale. It has had plates in it and pouches on it but never used or worn. The TTRAC system lets the vest break away if needed to ditch your gear in a hurry or have aid provided to you.
SOLD.
Used, but in great shape, Shellback tactical Banshee Rifle plate carrier. Comes with front and back plates and has a tactical Tailor 3 rifle mag and 3 pistol mag carrier on the front, $200
I am looking for an optic plate for the canik TP9sfx. I need the one for the leupold deltapoint. I tried to mount mine up and it pulled one of the heli-coil's out of the mounting plate so currently i can only mount my sight with one screw.
if anyone has this plate in their kit that they are not...
I would like to sell one of my Condor Plate carriers. Comes complete with both front and back AR500 plates. Like new, never used. Just a little dusty.
Also comes with a molle 3 AR USGI mag unit, and a molle flash light holder. Will not hold P-mags. USGI only.
Molle all over the thing, front and...
I am in Boardman, OR but willing to travel to Hermiston or so to make the sale. If you buy more stuff from me I will travel to Tri-Cities and surrounding areas. Selling Shellback Tactical Banshee ballistic Plate Carrier/ Vest with level III+ plate and trauma pad. Plate is by AR500ARMOR and has...