Eocene Epoch. Eocene Epoch, second of three major worldwide divisions of the Paleogene Period (66 million to 23 million years ago) that began 56 million years ago and ended 33.9 million years ago. It follows the Paleocene Epoch and precedes the Oligocene Epoch. The Eocene is often divided into Early (56 million to 47.8 million years ago), Middle (47.8 million to 38 million years ago), and Late (38 million to 33.9 million years ago) epochs.
digress - lose clarity or turn aside especially from the main subject of attention or course of argument in writing, thinking, or speaking; She always digresses when telling a story; her mind wanders; Don't digress when you give a lecture.
Ingress and Egress. In trench terminology, ingress and egress are words used to describe access into and exits from the trench. According to OSHA, trenches that are 4 feet or deeper require stationary egress options. Ladders, for example, must be provided and spaced such that trench workers do not have to travel more than 25 feet to the nearest ladder. This helps workers make quick getaways in a flood or cave-in.