The San Andreas fault is an example of Transform tectonic plate boundary. <span>The San Andreas fault is a long narrow valley where the plates that make up the fault meet. It consists of the Pacific Plate and the North American Plate. These plates slide past each other when they move. It is also known as a strike-slip fault. As the plates bump and jam against each other as they slide past each other, earthquakes jar the regions around these plates.</span>
<span>An eon is a geologically around tens of millions of years. A period is a million year included in an eon which is also made up of several eras. Therefore my answer is a period due to it being a subset of an era which is a subset of an eon.</span>
