Soil Formation, Degradation, and Conservation
Mechanical or Physical Weathering: Rock Fragmentation
Mechanical or physical weathering occurs without altering the chemical composition of rocks, deserts, and minerals. Intense examples can be seen in Lost Montana.
Unloading Pressure
When rocks outcrop due to the elimination of covering materials by erosion, they experience decompression. This decompression leads to the appearance of several cracks, such as:
- Relaxation or expansion cracks
- Contraction differential cracks due to large temperature variations
Earth’s Moon and the Sun: Characteristics, Movements, and Eclipses
The Moon
Basic Facts
- The Moon is Earth’s only natural satellite.
- It reflects sunlight.
- It orbits Earth in a spherical path.
- Its size is 1/49th that of Earth.
Surface Features
Lunar surface roughness is visible with telescopes and during solar eclipses, where prominences in the chromosphere appear as bumps.
Phases
Unlike the Sun, the Moon’s appearance varies from a fully illuminated disc to different levels of brightness.
Movements
Real Movements
- Rotation: The Moon rotates on its axis, taking approximately 27
Coastal & Port Infrastructure Glossary: A to Z
Glossary of Coastal and Port Infrastructure
Accessibility
Chance of access or passage for pedestrians, vehicles, and/or the disabled from one sector to another.
Refine
Action planimetric information to supplement the numerical data of dimensions or levels in a project engineering or architecture. Place dimensions on the plans. (2) Demarcation; point out terms of a field.
Aquaculture
Cultivation of plants and aquatic animals for use or human consumption. / Activity aimed at the production of hydro-biological
Read MoreMineral Resources: Formation, Use, and Exploitation
Magmatic Mineral Resources
Magmatic processes, both internal (plutonic) and external (volcanic), form magmatic rocks through crystallization. Fractional crystallization and magma consolidation involve:
- Initial crystallization of iron and magnesium-rich minerals, resulting in dark-colored rocks.
- Depletion of silica, calcium, aluminum, and sodium in the magma.
- Crystallization of the remaining water-rich magma, forming hydrothermal water that carries dissolved metals, filling rock cracks and crystallizing.
Earth’s Structure, Plate Tectonics, and Rock Deformation
Rock Cycle
The rock cycle involves processes that modify rocks, transforming them into sediments. On the Earth’s surface, weathering breaks down rocks into sediments, which are transported by geological agents and accumulate in sedimentary basins. Within the Earth’s crust, high pressure and temperature transform sediments into rocks.
Factors within the Crust:
- Pressure: The weight of overlying rocks increases with depth.
- Temperature: Increases with depth, approximately 3°C per 100 meters.
- Compression
Spain’s Natural Environment: Hazards, Pollution, Conservation, and Climate
Nature and Environment in Spain
Natural hazards are environmental features that threaten human life or can produce catastrophic consequences. Geological risks originate from within the Earth or externally. Hydrometeorological hazards, such as floods, are frequently caused by heavy rainfall. Actions against these natural hazards include:
- Construction of infrastructure to mitigate common risks.
- Creation of welfare and surveillance systems.
- Implementation of emergency protocols by promoting natural risk