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

Key Environmental and Biological Concepts

• Abiotic: Nonliving components of an ecosystem, such as soil, water, air, light, nutrients, and the like.
• Biscayne Aquifer: A surficial aquifer consisting of a shallow layer of highly permeable limestone located under a portion of South Florida, covering approximately 4,000 square miles.
• Circadian Rhythms: A biological process that displays an endogenous, entrainable oscillation of about 24 hours. These 24-hour rhythms are driven by a circadian clock.
• Climate: The long-term average pattern of local, regional, or global weather.
• Condensation: The transformation of water vapor into a liquid state.
• Critical Daylength: The classification of plants based on their flowering response to the length of daylight.
• Day-

... Continue reading "Fundamental Ecology and Environmental Science Terms" »

Precipitation

All forms of water that fall to Earth, including rain, snow, hail, sleet, fog, mist, drizzle, and the measured amounts of each.

Rain Shadow

A dry region on the leeward side of a mountain range resulting from a reduction in rainfall.

Runoff

The draining away of water.

Soil

Soil is the medium for plant growth, the principal factor controlling the fate of water in terrestrial environments, nature's recycling system (which breaks down the waste products of plants and animals and transforms them into their basic elements), and a habitat to a diversity of animal life, from small mammals to countless forms of microbial life.

Short-Day Plant

A plant that flowers only after being exposed to light periods shorter than a certain length, typically... Continue reading "Understanding Key Environmental and Soil Science Terms" »

The News: is the account of an event that has recently occurred and is considered to be of public interest.

Headline: is the heading

Lead: captures the essence of the news, the event that occurred, the location, and the time.

Body: develops the subject matter of the news.

Newspaper: is a publication that collects the most recent news on different topics.

Hyperonyms: words whose meaning includes that of others

Hyponyms: words whose meaning is included in that of others

News Era: where the topic it deals with is briefly indicated.

Gigantism: a disease whose body parts are larger than normal.

Oleaginous: oil substance.

Pronouns: are words that are equivalent to a noun or a nominal group.

Demonstrative Pronouns: are words that refer to an object.

Numeral and

... Continue reading "Earth Science Concepts" »

Well Cementing: Primary and Remedial Operations

Primary Cementing

Primary cementing is the process of placing a cement sheath in the annulus between the casing and the formation. Its objectives include:

• Removing drilling fluid from the casing interior and borehole
• Placing a cement slurry in the annulus
• Filling the casing interior with a displacement fluid (e.g., drilling fluid, brine, water)

A bottom plug separates the cement slurry from the drilling fluid, while a top plug separates it from the displacement fluid. The bottom plug ruptures upon landing at the casing string's bottom, allowing the cement slurry to flow into the annulus.

Remedial Cementing

Remedial cementing occurs after primary cementing to inject cements into strategic well locations... Continue reading "Well Cementing: Primary and Remedial Operations for Well Integrity" »

The Ideal Soil for Farming: Loam

The best type of soil for farming is loam. Its balanced composition of sand and clay particles creates both large and small pore spaces. This structure provides an ideal environment for plant growth by:

• Ensuring a steady supply of air and water.
• Retaining moisture while allowing excess water to drain, preventing waterlogging.

Loamy soils are also rich in nutrients due to their clay content and are relatively easy to work with. Their pH level typically falls between 5.5 and 8.0, making them suitable for a wide range of crops.

Sandy Soils: The Hungry Type

In contrast to loam, sandy soils are often described as “hungry” because their large particle size and loose structure lead to:

• Rapid drainage, resulting in nutrient

... Continue reading "Understanding Soil Types and the Water Cycle for Sustainable Farming" »

The Seismic Method

An indirect method of study that looks at the variations in the propagation speed of seismic waves as they travel through different materials inside the geosphere.

What are Seismic Waves?

Vibrations generated inside the Earth at the point where an earthquake takes place. They propagate in all directions, and the more rigid the material they pass through, the more quickly they travel. There are three types:

• P waves: Cause the material to vibrate, alternating between compression and dilation. These waves propagate through solids and liquids.
• S waves: Cause the material to oscillate perpendicular to the direction of propagation. They are slower and cannot travel through liquids.
• Surface waves: Generated when P and S waves reach the

... Continue reading "Earth's Interior Structure: A Seismic and Geochemical Perspective" »

Key Concepts in Geology

(exam3)1:superposition=the oldest on the bottom, youngest on top/2:original horizontality=sedimentary layers/lava flows are deposited as flat layers/3:lateral continuity=rocks extend in all directions until they reach the edge of a basin or pinch out/4:cross-cutting=faults and fractures are younger than the rocks they cut through/5:unconformities=missing time/6:inclusions=chunks of weathered rock are older than the rock they are contained in/7:continental drift=Alfred Wegener/8:Alfred Wegener=Pangaea/9:not a major tectonic plate/Juan de Fuca Plate/10: lithosphere=composed of crust and upper mantle/11:continental crust=composed of granite and basalt/12:transform boundary=one colliding plate will be forced because of difference... Continue reading "Understanding Geology: Key Concepts and Terms" »

Mooring Line

A rope or wire used to make a ship fast to a quayside.

Traffic Separation Scheme

A routing measure aimed at separating opposing streams of traffic by appropriate means and establishing traffic lanes.

Liferaft

A small, inflatable watercraft without a motor, carried for emergency evacuation in the event of a disaster aboard a ship.

Immersion Suit

A special type of waterproof dry suit that protects the wearer from hypothermia from immersion in cold water after abandoning a sinking or capsized vessel, especially in the open ocean.

Lifeboat

A small, rigid watercraft fitted with a motor, carried for emergency evacuation in the event of a disaster aboard a ship.

Island

A land mass, especially one smaller than a continent, entirely surrounded by... Continue reading "Essential Maritime Terms: Safety and Navigation Rules" »

Igneous:form.Melting Magma(surface),Lava:magma extruded to surface,Granite&Basalt. Intrusive(below surf pluton-100km2batholith)Extrusive(above surf)90% crust,Jointing-parallel cracks,Exfoliation-peel-off.(Ex.Dome)

Sedimentary:compounds settling(weathering,compaction,cementation-Limestone&SandStone)strata=layers,Clastic sediments=transported water,wind,ice,grav.Chemical sediments=minerals dissolved solution.

Metamorphic:altering processes(heat&pressure)Harder,compression, crushed,cooked,shear and stress.Ex:Marble,Gneiss,slate.Foliated=texture distinct wavy lines of min. Plate tectonics:adrift cause convection currents in upper mantle 6cm/y,Pangae=allEarth-225mil y Triassic Period,Tectonic=building-constr.Sea-floor-spreading-64miKm... Continue reading "Comparing the surface wind to the 3000ft wind:" »

Essential Concepts in Earth's Atmosphere and Oceans

Thermodynamics and Heat Transfer

Temperature

The average kinetic energy of molecules or atoms in a material, representing the kinetic energy of a substance.

Heat

The total energy of molecules or atoms in a material. You can have a large amount of heat but low temperatures, or high temperatures but little heat (depending on the mass of the substance).

Latent Heat

The amount of heat required to completely change a quantity of water from phase A to phase B with no corresponding change in temperature. The term “Latent” means “hidden.”

Latent Heat vs. Sensible Heat

Latent and sensible heat are types of energy released or absorbed in the atmosphere.

• Latent Heat: Related to changes in phase (e.

... Continue reading "Essential Concepts in Meteorology and Oceanography" »