Geomorphology: Landscapes Shaped by Earth’s Processes
1. Fluvial Landscapes (Rivers and Streams)
Erosional Processes
- Downcutting: Vertical erosion of a river channel, leading to the formation of V-shaped valleys.
- Lateral Erosion: Widening of the river channel, creating features like floodplains.
- Headward Erosion: Extension of the river channel at its source, contributing to the lengthening of the river.
Depositional Landforms
- Floodplains: Flat areas next to the river, formed by periodic flooding and deposition of sediments.
- Alluvial Fans: Cone-shaped deposits
Understanding Climate and Weather Phenomena
Climate and Weather Phenomena
Understanding Key Concepts
Dryness
Dryness occurs when evapotranspiration exceeds precipitation, meaning the land loses more water to the atmosphere than it receives. This can happen even without a complete absence of rain.
Mediterranean Climate
A temperate climate characterized by hot, dry summers with low rainfall (where evapotranspiration surpasses precipitation) and mild, dry winters. Rainfall is scarce and primarily occurs in spring and autumn. Average annual temperatures
Read MoreMagmatism and Metamorphism: An Overview
Magmatism and Magmatic Rocks
Magmatism is the geological process by which magmas are generated, move, rise, and cool, forming magmatic rocks. It is the primary petrogenic process, as over 80% of the Earth’s crust is composed of magmatic rocks. Magmatism also plays a crucial role in crustal dynamics, including the formation of oceanic crust and seafloor spreading.
The most visible evidence of magma is volcanism, a process where magma reaches the surface as lava, cools, and forms volcanic rocks. However,
Read MoreRelief of the Iberian Peninsula
Morphostructural Unit Types
The Iberian Peninsula’s relief has three main features:
- Massive form: The peninsula has a large width from west to east coasts and a rectilinear shape.
- High average elevation: Its average elevation is only surpassed in Europe by Switzerland, with several high mountain ranges.
- Peripheral mountainous provision: A plateau surrounded by mountains limits the influence of the sea.
Types of Morphostructural Units:
- Skirting: Plains and plateaus of the Primary Era, formed as a result
Geological Processes: Earth’s Formation, Evolution, and Plate Tectonics
ITEM 11: Dorsal Features and Plate Tectonics
Dorsal Features
Dorsal: 2/3 km seamounts on abyssal plain.
Failure: Fractures displaced laterally.
Ages
- Rocks on the ridges: Basalts 1 million years old.
- Aging on separating the dorsal: Increased every time we parted dorsal.
- Age-related power: Power and thickness increase away.
Lithosphere
The lithosphere is created at the ridges and spreads laterally. There are places where the lithosphere is reintroduced into the deep Earth (subduction zones). Volcanoes and
Read MoreEnvironmental Degradation in Spain: Causes, Impacts, and Solutions
Environmental Degradation in Spain
Introduction
The industrial and economic development, coupled with population growth in Spain, has led to significant environmental challenges. In recent years, there’s been a rise in ecological awareness among Spaniards, influenced by cultural and educational factors. This awareness highlights the degradation of the country’s natural resources and the need for legislation to protect remaining natural areas.
Soil Degradation
Soil degradation, including erosion, salinization,
Read More