Notes, summaries, assignments, exams, and exercises for Geology for Other courses

National Water Plan

Project coordinating river basin management plans and water resources. The 2008 plan, aligned with EU guidelines, focuses on environmental actions (supply, treatment, purification, irrigation, forestry impact, channels) and works regularization, including the Ebro water transfer and construction of new dams.

Water Transfer

Interbasin transfer from water surplus to deficit areas. Currently, 38 are operational, including the Tajo-Segura. The National Hydrological Plan proposes new transfers, like the Ebro to the Mediterranean. However, protests in regions like Aragon and potential environmental impacts (Ebro Delta) have led to exploring alternatives, such as the Rhone-Catalonia transfer.

Reservoirs

Artificially stored water extensions...

Geology is the science that studies the composition, structure, and evolution of the Earth over geologic time. It is divided into several branches:

1. General Geology: Describes the physical characteristics of the land.
2. Petrography: Deals with the study of rocks.
3. Geotectonics: Studies the planet's interior and the phenomena of the crust, such as faults and folds.
4. Geomorphology: Analyzes the Earth's landforms and the factors leading to their transformation.
5. Mineralogy and Crystallography: Dedicated to the analysis of minerals and their behavior in nature.
6. Meteorology: Studies the atmosphere.
7. Oceanography: Investigates large bodies of water and their depths.
8. Geological History: Studies geological time, eras, or ages.

Brief History of Geology

The science of...

Earth Science Final Exam Review

April 14, 2025 – Lecture 18: Natural Resources – Energy and Mineral Resources

Natural Resources: An Introduction

Natural resources are materials or substances that occur in nature and can be used for economic gain. Humanity cannot create natural resources; they take millions, even billions, of years to form within Earth. Therefore, we are limited to what nature provides. Natural resources are broadly classified into eight groups: wildlife, air, wind, soil, water, fossil fuels, sunlight, and minerals (including precious metals like copper, gold, silver, nickel). Mineral resources, by definition, are inorganic, meaning they are not derived from living things (for example, coal is considered organic because it...

The Physical Geography of Europe

The environment in Europe is naturally favorable, characterized by temperate and maritime climates.

3.1 Geological History and Relief Formation

The European continent has a surface area of 10,500,000 km² with an average altitude of 300 meters. Geological history has profoundly shaped the current reliefs of Europe.

• The Precambrian shields form the core and basis of the continent.
• In the Paleozoic Era, the Caledonian Orogeny lifted the relief of Northwestern Atlantic Europe.
• The Hercynian Orogeny generated the central massifs of Europe.

During the Mesozoic Era, erosion acted upon these reliefs, forming erosion surfaces, while sediments accumulated in the Tethys Sea and continental basins. During the Tertiary Period,...

European Relief: Major Morphostructural Units

As a result of geological evolution, Europe possesses several distinct morphostructural units:

1. The Baltic or Fennoscandian Shield

This unit occupies most of Finland and Sweden and the far northwest of Scotland. It is a flat, badly eroded area, which corresponds to a Precambrian erosion surface that has remained stable so far.

2. Platforms, Ancient Massifs, and Sedimentary Basins

These features are primarily related to the devastation caused by erosion following the Primary Orogenies (Caledonian and Hercynian).

Platforms (Sockets)

The **platforms** are flat areas that arise from the erosion of the ridges raised during the two Primary Orogenies: the Caledonian and the Hercynian. These platforms were fractured...

Limit equilibrium methods are used for soil analysis, particularly for determining the material factor of safety. These methods analyze a finite number of potential sliding surfaces.

For each surface, equilibrium is formulated using the maximum stresses available along the sliding surface, with soil strength reduced by an unknown factor F. The value of F is obtained from the solution of the resulting equations.

In soils, commonly selected surfaces are straight lines, circles, or log spirals. In rocks, sliding is governed by weakness planes, and hence blocks or wedges with planar faces are considered.

Corrective Measures for Soil Instability

Corrective measures typically involve either reducing unfavorable actions (weight and/or water flow) or increasing...

Evolutionary Theories

Current thought posits that diverse life forms share a common ancestor known as LUCA. Several theories exist, including Charles Darwin's, which centers on morphological variations in species. These changes, slow, gradual, and driven by natural selection, were later understood to result from DNA alterations. This new understanding shifted the focus from individuals to populations. The gradual evolution concept faces challenges due to the incomplete fossil record.

Homo Sapiens

Our species is distinguished by a highly developed brain, tool-making abilities, language, and extended childhood. Africa, where most hominin fossils have been discovered, is considered the cradle of hominization. The oldest fossils, Ardipithecus ramidus,...

The Earth's crust is made up of three main types of rocks: igneous, sedimentary, and metamorphic.

Igneous Rocks

Igneous rocks are formed when magma (molten rock) cools and solidifies. They can be classified into two main types: intrusive and extrusive.

• Intrusive igneous rocks are formed when magma cools and solidifies slowly beneath the Earth's surface.
• Extrusive igneous rocks are formed when magma cools and solidifies quickly on the Earth's surface.

Sedimentary Rocks

Sedimentary rocks are formed when sediments (pieces of other rocks, minerals, or organic matter) are compacted and cemented together.

• Clastic sedimentary rocks are formed from the accumulation of broken pieces of other rocks.
• Chemical sedimentary rocks are formed from the precipitation

Watershed / River System

A watershed, also known as a river basin or drainage basin, is the territory drained by a main river and its tributaries. It is bounded by watersheds (divides). A basin is considered symmetrical if the structure and number of its tributaries are similar in both areas. In Spain, the largest basin is that of the Douro River.

Fluvial Regime

A fluvial regime refers to the variation of river flow throughout the year. It depends on rainfall distribution and the importance of snowmelt. Accordingly, we can speak of pluvial, nival, or mixed fluvial regimes.

Rambla

A rambla is a watercourse, generally dry, which theoretically carries a river current. Ramblas appear in rivers that have a torrential regime, meaning they have no flow...

Patagonian Andes and Fueguinos

They are isolated, separated by wide valleys. From Pino Hachado to Staten Island, they form two high-elevation areas (3,000 meters), separated by a sector with peaks not exceeding 2,500 meters above sea level. Key peaks include Lanín volcano and Tronador.

The last glaciation greatly influenced this landscape. Remnants persist as continental ice fields and glaciers like Perito Moreno.

Rivers originating here have great power, harnessed for hydroelectricity (e.g., Futaleufú Dam).

Temperature varies with altitude. Prevailing westerly winds bring heavy rainfall, especially in winter. Slopes are forested, with trees over 20 meters tall and an understory of shrubs and Colihue reeds.

Introduced plant and animal species...