The term "Wenlock Group" refers to a geological formation found in England. This assemblage of rocks, predominantly shale and limestone, holds great geological significance. Synonyms for the phrase "Wenlock Group" include "Wenlock shale", "Wenlock limestone", or even simply "Wenlock Formation". These terms are often used interchangeably to describe the same geological strata. The name "Wenlock" is derived from the town of Much Wenlock in Shropshire, where these rocks were first extensively studied. The Wenlock Group represents a crucial time period in Earth's history, providing a wealth of information about marine life and environmental changes that occurred during the Silurian period, approximately 425 million years ago.