Use "sub layer" in a sentence

1. This thin region is known as the viscous sub-layer.

2. (b) an analytical sub-layer, which shall present analytical reports, risk rating trends, regional monitors and briefing notes relevant for the concerned Member State;

3. The invention allows higher levels to invoke through one standardized interface the medium-access-control (MAC) sub-layer for the purpose of color-function support.

4. Seamounts form from magmatic eruptions, which occur when lava seeps up to the crust through the partially-melted sub-layer, known as the asthenosphere, in the mantle.