The formation contains a large amount of iron, but there has been little exploration.

A sextet is a formation containing exactly six members.

A septet is a formation containing exactly seven members.

It has been estimated that this formation contains 800 billion vertebrate fossils.

Detecting and analyzing these heavy gases help to determine the type of oil or gas the formation contains.

Because the older formations contained many mineral deposits, they were explored very early on by the mining industry.

The process includes the following steps: Injection wells are drilled into the formation containing the uranium.

When a formation is porous and contains salty water, the overall resistivity will be low.

Most underground formations contain water, often salt water, in their pores.

The formation contains abundant brown iron oxides and many concretions are found in the area.