The growth of Rayleigh-Taylor-type instabilities in the lithosphere for various rheological and dens

A rotary mower comprises a cutting cylinder with a collar section, having a plurality of blades mounted thereabout at spaced intervals. The blades are rotatable about their mounting to prevent damage when the blade strikes loose stones and the like. The blade may be mounted within a channel style roof or a predetermined collar section or collar ring which permit a complete or partial rotation of the blade. The mower also includes suitable ducts and at least one radially arranged vane on the underside of each cutting cylinder with one saucer underneath each cutting cylinder and at least one predetermined lamination inside each saucer to provide a vertical updraft whereby the material being cut by the mower is elevated upwards for cutting purposes.

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