Geologic time scale (spiral)

The geologic time scale proportionally represented as a log-spiral featuring major events in Earth history, and the evolution of life.

Syncline and anticline

In structural geology, a syncline is a fold with younger rock layers closer to the center of the structure, whereas an anticline is the inverse of a syncline.

Entrada Formation (Utah)

Interpreted Unmanned Aerial Vehicle (UAV) model of a cliff showing igneous intrusions. Profile is from the Entrada Formation (160 Ma, Utah).

Geologic time scale

The colour-vision deficiency friendly geologic time scale from the s-Ink science graphics collection.

SZI geologic evidence

Schematic illustration of the emplacement of subduction zone initiation (SZI)-typical rock evidence during SZI, and a typical SZI ophiolite sequence.

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