Pioneer species
The first organism in barren landscape is pioneer species.
The first organism in barren landscape is pioneer species.
The first organism in barren landscape is pioneer species.
The first organism in barren landscape is pioneer species.
Colonization .
pioneer species
The first organism in barren landscape is pioneer species.
Their seed dispersal rate.
A drumlin is a land-form from glacial deposition, which was once eroded. It is formed both by erosion and deposition. A drumlin is formed when moraine deposited by a retreating glacier is subsequently reshaped by the returning glacier the following year or after the glacial interval with caused the glacier to retreat in the first place.
Striations are "scratches" left in bedrock by glaciers. A small particle of rock, generally pebble sized or smaller, becomes entrained in the base of the glacier and dragged along the surface of the bedrock. These can often be seen on hard bedrock surfaces that are resistant to subsequent weathering after the retreat of the glacier. Erratics are large rocks that are found out of place in the landscape, i.e. not near where they were formed. They are removed from their provenance by a glacier and transported away, before being deposited in a different part or the landscape when the glacier melts.
Glacial advance and retreat is determined by the balance between the accumulation of snow and the removal of ice by sublimation, melting, and calving (ablation). When the rate of ablation below the snowline equal
Glaciation refers to climatic episode in which much of the Earth becomes covered with glaciers, reaches a peak in glacial coverage, and then ends with the retreat of glaciers.