Geological Influences

• Angiosperms

Flowering plants that first appeared in the Cretaceous, revolutionizing the global food web with nutrient-dense energy.

• Braided Rivers

Networks of shallow, high-energy river channels that formed the Otter Sandstone in an arid basin.

• Chalk

A soft limestone formed almost entirely from the microscopic remains of coccolithophores (marine algae).

• Chicxulub

The asteroid impact site associated with the Cretaceous-Paleogene extinction event 66 million years ago.

• Coccolithophores

Single-celled marine algae whose remains constitute the microscopic architecture of Cretaceous chalk.

• Cross-bedding

Angled layers in sedimentary rock that indicate the direction and strength of ancient water or wind currents.

• Evaporites

Minerals like gypsum and halite (salt) that remain after ancient lakes or ephemeral water sources dry up.

• Great Dying

The Permian-Triassic Extinction event; the most catastrophic collapse in Earth’s history, wiping out the vast majority of species.

• Iron Oxide

A chemical compound (rust) that gives the Sidmouth cliffs their characteristic deep red color.

• Mesozoic Era

The geological era comprising the Triassic, Jurassic, and Cretaceous periods; often called the "Age of Giants."

• Nonconformity

A geological phenomenon where two rock layers of vastly different ages meet, indicating a gap in the chronological record.

• Otter Sandstone

A rock formation in Sidmouth birthed by ancient river systems and containing fossils of Triassic reptiles.

• Pangea

The ancient supercontinent where all Earth's landmasses were joined, creating extreme climates and vast deserts.

• Sidmouth Mudstone

A crumbly, red-brown rock layer formed in stagnant desert lakes; it is impermeable and erodes more easily than sandstone.

• Slip Plane

A lubricated subterranean boundary between rock layers (such as sand and mudstone) that facilitates landslides.

• Upper Greensand

A yellowish-green, porous sandstone deposited during the Cretaceous period when sea levels rose.