What is a transgressive sequence?

During a transgression the sequence of rocks will show an onlap sequence (the facies will become deeper-water environments as you move up through the sediments). During a regression the sequence of rocks will show an offlap sequence (the facies will become shallower environments as you move up through the sediments).

What happens during transgression?

A Marine Transgression is a geologic event during which sea level rises relative to the land and the shoreline moves toward higher ground, resulting in flooding. Transgressions can be caused either by the land sinking or the ocean basins filling with water (or decreasing in capacity).

Which vertical sequence is evidence of a transgression?

A transgression will produce a vertical sequence of facies representing progressively deeper water environments (a deepening-upward sequence).

How do you know if its a regression or transgression?

A transgression is a landward shift of the coastline while regression is a seaward shift. The terms are applied generally to gradual changes in coast line position without regard to the mechanism causing the change.

What is transgressive geology?

1. n. [Geology] The migration of shoreline out of a basin and onto land during retrogradation. A transgression can result in sediments characteristic of shallow water being overlain by deeper water sediments. Antonyms: regression.

What is transgression and regression?

What is an example of transgression?

1. The definition of a transgression is an act that goes past set limits or breaks a law. An example of a transgression is having an affair. Driving 100 mph in a 55 mph zone is an example of a transgression. noun.

What is a transgression in geology?

What rock sequence indicates a marine transgression?

Look at the sequence in the Figure below and see if you can determine whether the sea was transgressing or regressing. At the bottom, the Tonto Group represents a marine transgression: sandstone (11), shale (10), and limestone (9) laid down during 30 million years of the Cambrian Period.

What are the causes of transgression?

Transgressions can be caused by the land sinking or by the ocean basins filling with water or decreasing in capacity. Transgressions and regressions may be caused by tectonic events such as orogenies, severe climate change such as ice ages or isostatic adjustments following removal of ice or sediment load.

What is transgression in geography?

A marine transgression is a geologic event during which sea level rises relative to the land and the shoreline moves toward higher ground, which results in flooding. Transgressions can be caused by the land sinking or by the ocean basins filling with water or decreasing in capacity.

What is transgression in geology?