flattened cells that overlie a base layer composed of columnar cells make up the uppermost layer of skin.
what type of cells make up the uppermost layer of skin?
flattened cells that overlie a base layer composed of columnar cells
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oceanic crust









































oceanic crust is the uppermost layer of the oceanic portion of a tectonic plate. it is composed of the upper oceanic crust, with pillow lavas and a dike complex, and the lower oceanic crust, composed of troctolite, gabbro and ultramafic cumulates. the crust overlies the solidified and uppermost layer of the mantle. the crust and the solid mantle layer together constitute oceanic lithosphere.
oceanic crust