Anthropocene and Human Modifications of Surface Dynamics

Vocabulary flashcards covering key concepts, quantitative metrics, and terminology regarding human modifications of surface dynamics and the Anthropocene.

Anthropocene

A proposed geological epoch (defined between 1620 and 1964) marking a global shift where human activities become a primary agent altering Earth's geological and surface dynamics.

Great Acceleration (Geomorphological)

An unprecedented exponential acceleration in geomorphological processes, such as soil erosion and land movements, starting around the 1950s due to intensified human activity.

Technological Denudation

The direct displacement, excavation, transport, and accumulation of soil and rock materials driven by human technological activities such as mining, construction, and agriculture.

Technosediments

Sedimentary deposits composed entirely or partially of human-made or human-transformed materials, including concrete, bricks, plastics, industrial slag, and ash.

Anthropogenic Morphogenesis

The direct creation of new topographic structures and landforms by human actions, such as open-pit mines, terraced slopes, highway embankments, and urban platforms.

Urban Morpholithogenesis

The geomorphological process describing the creation of new landforms and geological deposits under the direct influence of urban expansion and civil engineering.

Technogenic Slopes

Artificial slopes, hills, and terraces engineered by human earthmoving operations, quarrying, and land development.

Technosphere

The global system of human-made structures, materials, and infrastructure accumulating and fossilizing in the geological record as technofossils.

Golden Spike (Anthropocene)

A physical or chemical stratigraphic marker in sediment layers—such as microplastics, heavy metals, or radionuclide fallout—used to define the lower boundary of the Anthropocene.

Direct Technological Denudation Trend (1950–2015)

The global volume of human earthmoving activity, which grew by a factor of $\times 30$ overall and $\times 10$ per capita between 1950 and 2015.

Anthropogenic Sediment Production Growth (1950–2010)

The overall increase in sediment mobilization generated by human activities, which rose by +467\text{ }\format{r}{}\times or $+467BA$ ($+467BA$ total, specified as +467\text{ }\format{r}{}\%) between 1950 and 2010.

Anthropogenic Erosion Rate

The modern rate of human-induced soil erosion, which exceeds natural pre-20th-century erosion rates by $10$ to $100 \times$.

Geomorphological vs. Climatic Disaster Ratio

The relative frequency ratio comparing surface-based geomorphological disasters to pure climate events, which expanded by a factor of $\times 10$ over the 20th century (from 0.1–0.2 around 1900 to approximately 2.7 in 2022).

Sediment Continuity Rupture

The interruption of natural river sediment transport by dams and impoundments, trapping over 50\text{ }\format{r}{}\% of global fluvial sediment before reaching coastal zones.

Sustainable Land Management (GDT)

A framework of land-use practices—including conservation agriculture, organic carbon management, and agroforestry—designed to suppress soil erosion and restore surface stability.