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plates
Plate tectonics (from the Late Latin tectonicus, from the Greek: τεκτονικός "pertaining to building") is a scientific theory describing the large-scale motion of seven large plates and the movements of a larger number of smaller plates of the Earth's lithosphere, since tectonic processes began on Earth between 3.3 and 3.5 billion years ago. The model builds on the concept of continental drift, an idea developed during the first 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 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 (or faults). 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, or one plate moving under another, carries the lower one down 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 mechanical strength than the underlying asthenosphere. Lateral density variations in the mantle result in convection; that is, the slow creeping motion of Earth's solid mantle. Plate movement is thought to be driven by a combination of the motion of the seafloor away from spreading ridges due to variations in topography (the ridge is a topographic high) and density changes in the crust (density increases as newly formed crust cools and moves away from the ridge). At subduction zones the relatively cold, dense crust is "pulled" or sinks down into the mantle over the downward convecting limb of a mantle cell. 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.
Selling a new Esstac Deodon A.S.S. plate carrier in Multicam Arid. Includes a three magazine mid-length placard (5.56x45), and a tourniquet holder from T-Rex Arms. Also includes a new set of Hesco L210 ceramic plates (single curve). These plates are rated as Special Threat and will stop...
For Sale or Trade
I have two packs of Magpul L Plates in Foliage Green. Bought and never used. Each pack has 3 plates so you could do 6 mags total.
Asking $40 or trade for ammo or reloading supplies.
Chase tactical 4s17 level IV 10x12 NIJ CERTIFIED DEA Compliant ceramic hard armor plates made in the USA by Highcom. Weight 7.2 lb each. Never inserted, never used. Single curve. Asking $380.
Date of manufacture: 08.2020
Hoping to sell this weekend. Open to offers.
I have 4 plates available.
$300 per pair.
NIJ Level III Tested
Dimensions: 9.85" x 11.8"
Thickness: .75"
Weight: 5.29 lbs
Construction: PE+Alumina (AL2O3)
Single Curve
Stand-Alone and Multi-Hit Capable
1 in. Partial Foam Edge
Polyester/Nylon Cover
5 Year Shelf Life, made June 2020
Since moving to Washington 5 years ago, my main vehicle has had the same specialty plate that honors law enforcement and part of my registration goes to help the family of fallen officers.
I'm up for renewal and am considering either going to a standard plate, or to a military plate.
It's...
Lots of weights. These were taking out of a closed gym.
lots of olympic plates, dumbbells, barbell sets.
all used commercial Irongrip, with urethane coating.
https://portland.craigslist.org/clk/spo/d/vancouver-used-commercial-gym-equipment/7184968976.html
just got, not a fan of the weight/prefer LBE style. These plates are brand new unused. Website estimates 14-16 week lead time.
Cash only. Will meet to sell in Albany and other nearby towns. Serious inquires only please. Price includes both plates, not willing to sell separately.
Taken from the...
Set of 2 plates ordered, thought I was getting scammed and bought separate plates and then these came in. Would rather sell to someone who wants plates over sending back for a refund, but still want my money back so price is firm. Pick up or willing to meet up Locally. These plates are BRAND...
I have a ferro concepts slickster for sale.
Color is ranger green.
The plates are level 4 ceramic.
Just bought the plates less then 1 month ago.
I got a different carrier and that's the reason I am selling.
I had it setup but never did any running and gunning with it.
450$ or trade for an...
Looking to sell set of 2 unused AR500 Flat Regular FS Lightweight Advanced shooter cut plates. Only been put in a plate carrier a few times to try the fit and never worn. These plates go for over $100 per plate and they are hard to find these days so $150 seems about right for the price for...
They do exist… Brand new velocity systems mayflower APC With the holy Grail of chest rigs Haley strategic partners micro with triple mag insert. Comes with the velocity systems Swift clip already installed level three multi curve shooter cut AR500 plates with Non-Newtonian trauma pads installed...
5/16" thick steel plates
39" long
There are 10 of these total
Would be great for custom bumpers, winch plates, skid plates, cab guards, etc.
$40 obo for the lot.
Will trade for ammo
22lr
22mag
9mm
40mm
22-250
30.06
300 win
Keywords- 4x4, offroad, restore, custom, bumpers, winch, cabelas...
Hi friends!
Looking to see if anyone has any Bumper plates or similar for sale. Let me know what y’all have? Looking for about 200 lbs with of plates. Would prefer bumper system for my wife that fits Olympic bars. In the Hillsboro/Beaverton area
LMT10mm
Hey I am selling my AR 500 vest and plates, comes with the front and back and the 2 side plates. Got them coated in line x when I ordered them. I have had the Vest for about 3 years. Has a pistol holster on the front and 2 AR mag pouches and 2 pistol pouches. There is no size on it, I think it’s...
For sale is my armor setup. This was purchased new in March of 2020. The plates are Spartan’s Level 3+ steel rated to stop higher velocity threats such as XM193, M855 (Green tip 5.56), and M80.
Plate size is 10x12. The plates are single curved for more comfort and have Spartan’s full...