In general, irregular periods are very common during the perimenopause. The most common early menstrual irregularity noticed in the perimenopause is a shortening of cycle length.
Abiogenic petroleum origin. Abiogenic petroleum origin is a term used to describe a number of different hypotheses which propose that petroleum and natural gas are formed by inorganic means rather than by the decomposition of organisms.
Process of Fracking. The Marcellus shale is a rock formation that lies more than a mile beneath the earthâs surface. The formation is special because it contains a significant volume of natural gas trapped inside tiny spaces within the rock.