Notes, summaries, assignments, exams, and problems for Geology

Watersheds

a) The Watershed: This is the territory whose waters are discharged into a main river and its tributaries.

Features:

• They are separated by watersheds formed by the tops of the mountains that delimit them.
• Peninsular watersheds (North, Minho, Douro, Tagus, Guadiana, Guadalquivir, Pyrenees, Ebro, South, Jucar, and Segura).
• In the basin, the rivers circulate, forming a channel or a network from the tributaries and the main river.

Watershed Management

Joint catchments discharging into the sea itself. The cause is the inclination of the plateau to the west from the Iberian system.

• Rivers from the Cantabrian side: They are short because they are born in mountains near the coast. They are erosive, and there is a significant drop from their source

Fundamental Concepts in Earth and Life Science

Geology: Seafloor Features and Rock Formation

Seafloor Topography

• Mid-Ocean Ridges: Large submarine elevations located in the central part of oceans, averaging 2000m in height, featuring a central groove called a rift valley where magma rises.
• Ocean Trenches (Fosas): Deep, sunken areas representing the largest marine forms in subduction zones, typically located near the coasts of volcanic islands.
• Continental Shelves (Plataformas): The submerged part of the continents extending into the sea.
• Abyssal Plains (Llanuras): Flat areas covering the deep seabed.
• Continental Slopes (Taludes): Steep slopes descending to the ocean floor.

Tectonic Structures

• Folds (Pliegos): Undulations that occur when compressive

Forces and Their Deforming Effects

A force can produce a deformation in a body. Experience shows that the distorting effect of a force depends on its intensity and the area on which it acts.

Understanding Fluids and Their Properties

Effects of Forces on Fluids

Substances called fluids are characterized by their ability to flow, even passing through small orifices. They do not have a definite form but conform to that of the container they occupy. Both liquids and gases are classified as fluids. A key distinction is that liquids are generally difficult to compress, while gases are highly compressible.

Principles of Pressure in Fluids

Pascal's Principle

Pascal's Principle states that the pressure exerted on any point of a confined incompressible fluid... Continue reading "Physics of Fluids and Pressure: Key Concepts" »

Building Enclosure Systems

Opening Configurations

180-Degree Opening Enclosure

• Possibility of opening 180 degrees for enhanced sun and water protection.
• Space for exterior sun protection placement.
• Requires continuous thermal insulation.
• Carpentry and pre-frame protected from water in the chamber must address lintel, jamb, and windowsill solutions for the exterior.

Limited Opening Enclosure (Medium)

• Does not open 180 degrees, offering less protection and less space.
• Features perfect insulation continuity.
• Carpentry and pre-frame require protection from water in the chamber, addressing lintel, jamb, and interior solutions, along with exterior ledges.

Interior-Focused Enclosure

• Does not open 180 degrees.
• Provides minimal sun and water protection, necessitating

Energy Sources and Raw Materials

Alternative Energy Sources

Advantages: Inexhaustible, clean, and much cleaner than traditional sources. However, the technology is often poorly developed and therefore more expensive.

• Solar energy: Problems include daily and annual irregularity and difficult storage.
• Wind energy: The main problem is the irregularity of the wind.
• Biomass energy: A key issue is CO2 emissions.
• Tidal power: Problems include environmental changes and high cost.
• Geothermal energy: Highly localized in areas with volcanic activity.
• Nuclear fusion energy: Requires very high temperatures, and the onset and control of the nuclear reaction are still unresolved.

Raw Materials

Raw materials are natural resources, either organic or mineral.

They are... Continue reading "Energy Sources and Raw Materials: A Comprehensive Analysis" »

Biomass Energy

Biomass energy is stored in living members of an ecosystem. It is organic matter produced by plants and other photosynthetic organisms.

Fossil Fuels Explained

Fossil fuels are geologic deposits of organic materials. These buried fuels are formed by the decomposition of ancient organisms over millions of years.

Wind Power Generation

Wind power is energy produced by a system of rotating blades (turbines) that harness the wind's kinetic energy.

Petroleum: Earth's Liquid Gold

Petroleum is a heterogeneous mixture of organic compounds, primarily hydrocarbons (hydrogen and carbon), found beneath the Earth's crust.

Understanding Natural Resources

Natural resources are materials or substances occurring in nature, of either biotic or abiotic origin,... Continue reading "Essential Environmental and Agricultural Concepts" »

Permeabilimeter

b = 0.9 in cements, V = 1902 ± 157 mm³. Three repetitions, three significant figures.

Loss on Ignition

15 min, 1000°C. Calcine the crucible first, then 1 gr in an oxidizing environment. Cool.

During calcination, previously absorbed CO₂ and water are released, along with the decomposition of carbonates and bicarbonates (allowing detection of cement adulteration with limestone filler).

Components oxidized during calcination: sulfides pass to sulfates (cement considered in iron and steel) and metals such as Fe, Mn... (negligible).

An assessment is made with S^2- + 2O₂ = SO₄^2- and titrated with BaCl₂, precipitated BaSO₄.

Weathering

Premature hydration and carbonation of cement (becomes lumpy and reduces its resistance capacity).

Hydration... Continue reading "Cement Testing Methods and Properties" »

Introduction

Roman architectural innovations emerged before and particularly during the rise of a new social, urban, and religious organization, which demanded novel constructive approaches. These solutions proved decisive for all subsequent art movements, including Renaissance and Baroque, and continue to influence architecture today.

Characteristics of Roman Architecture

• Practicality and utility
• Grandeur and luxury as expressions of power
• Dynamism versus Greek statism
• Predominance of architectural works

The primary building materials were concrete (a mixture of stones, sand, water, lime, or Roman cement mortar) and baked brick. These inexpensive yet durable materials were often covered with stucco or marble slabs.

Architectural Elements

Supports

The... Continue reading "Roman Architecture: Innovations and Influence" »

Item 12: Impacts on the Hydrosphere

Effects of Water Pollution

Eutrophication

Eutrophication is defined as the excessive supply of nutrients in a body of water, leading to a depletion of oxygen. When large amounts of organic matter reach a poorly oxygenated body of water, such as a lake or reservoir, microbial decomposition consumes the available oxygen while releasing phosphates and nitrates.

The surface layers lose transparency and take on a greenish color because algae reproduce in the waters close to the surface, consuming the phosphates and nitrates. The oxygen produced by the algae through photosynthesis escapes into the air, further decreasing the oxygen available for other organisms, which are subsequently harmed.

• Causes: Wastewater containing