Foundation Manual Chapter4, Footing Foundations

Footing foundations, also known as spread, combined, or mat footings, transmit design ... For example, a shallow footing supported on very dense sand will usually fail in general shear, but the same footing supported on very dense sand that is underlain by a soft clay layer may fail in punching shear.

  Foundations, Shallow, Footings, Footing foundation, Shallow footing