Answer :
The change in the composition of the Edinburg formation tells us about the type of tectonic activity that was taking place to the east that the Taconian mountains were building to the east providing a source of siliciclastic sediment.
The Edinburg Formation is an Ordovician-age terrestrial composition in Virginia. It is generally collected of basinal (deep sea) rock formed from sediment and rock and is an individual of the more immature wholes in the "Middle Ordovician" order of the Shenandoah Valley.
Tectonic activity happens around plate edges. Plate frontiers are fields on Earth place two crustal plates meet each other. Tectonic activity is a controlled theory that expounds in what way or manner important landforms are generated on account of Earth's hidden drives. The theory, which hardened in the 1960s, mutated the dust sciences by interpreting many wonders, including peak construction occurrences, volcanoes, and shocks.
To know more about Tectonics refer to: https://brainly.com/question/1162125
#SPJ4