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.
The process of fracking creates fractures that extend from wells into oil and gas formations by pumping highly-pressurized fluid--water, sand, ceramic beads, and a mixture of chemicals--into the oil or gas formation.