Articles related to "Geophysics"
Absolute Time 1
Through research, physicists and geologists have determined that certain isotopes of elements will decay into new elements. Using the decay rate, and knowing the half-life of the isotope, a geologist can date a sample of rock and determine its age.
geology • geophysics • isotopes • half-life • uranium
Through research, physicists and geologists have determined that certain isotopes of elements will decay into new elements. Using the decay rate, and knowing the half-life of the isotope, a geologist can date a sample of rock and determine its age.
geology • geophysics • isotopes • half-life • uranium
Absolute Time 2
Radiometric dating is a complex method for dating the rocks of the earth. There are only a few types of rock that can be dated, and potential problems that need to be avoided to give an accurate date for the rock sample.
geology • geophysics • radiometric • time • isotope
Radiometric dating is a complex method for dating the rocks of the earth. There are only a few types of rock that can be dated, and potential problems that need to be avoided to give an accurate date for the rock sample.
geology • geophysics • radiometric • time • isotope
An Introduction to Geology
An introduction to the science of geology. What does a geologist do and what does a person need to become a geologist.
geology • geophysics • mineralogy • sedimentology • volcano
An introduction to the science of geology. What does a geologist do and what does a person need to become a geologist.
geology • geophysics • mineralogy • sedimentology • volcano
Arctic National Wildlife Refuge - Part 3
The entire area along Alaska’s North Slope is a delicately balanced ecosystem. Is it possible to explore, develop and produce a large oil field without seriously impacting the wildlife? The oil companies feel they can.
geology • geophysics • oil • gas • alaska
The entire area along Alaska’s North Slope is a delicately balanced ecosystem. Is it possible to explore, develop and produce a large oil field without seriously impacting the wildlife? The oil companies feel they can.
geology • geophysics • oil • gas • alaska
Book review: No Apparent Danger
Review of the book, No Apparent Danger by Victoria Bruce that looks at the volcanic disasters at Galeras and Nevado del Ruiz in Columbia
geology • geophysics • volcano • eruption • lahar
Review of the book, No Apparent Danger by Victoria Bruce that looks at the volcanic disasters at Galeras and Nevado del Ruiz in Columbia
geology • geophysics • volcano • eruption • lahar
Earth's Interior
What we see of the Earth at the surface is compossed of less than one percent of the Earth's mass. Over 99 percent of the Earth's mass will never be seen or physically studied by geologists. Despite this, geologists know quite a lot about the Earths interior.
geology • geophysics • seismic • p-waves • s-waves
What we see of the Earth at the surface is compossed of less than one percent of the Earth's mass. Over 99 percent of the Earth's mass will never be seen or physically studied by geologists. Despite this, geologists know quite a lot about the Earths interior.
geology • geophysics • seismic • p-waves • s-waves
Earthquakes
We have all probably seen the results from earthquakes, and many of us have experienced an earthquake as it occurred. But how do geologists know where and earthquake was centered and how strong it was? This article will look at earthquakes in detail.
geology • geophysics • fault • faults • earthquakes
We have all probably seen the results from earthquakes, and many of us have experienced an earthquake as it occurred. But how do geologists know where and earthquake was centered and how strong it was? This article will look at earthquakes in detail.
geology • geophysics • fault • faults • earthquakes
Everything a geologist needs to be successful in the field.
Going into the field is not a simple undertaking. It takes time to prepare for a field trip, to plan and organize the trip, even if it's across town. The geologist must have the right tools and equipment. Read on to see what it takes to be a successful field geologist.
geology • geophysics • earth science • earth • hammer
Going into the field is not a simple undertaking. It takes time to prepare for a field trip, to plan and organize the trip, even if it's across town. The geologist must have the right tools and equipment. Read on to see what it takes to be a successful field geologist.
geology • geophysics • earth science • earth • hammer
Faults
The earth is a dynamic system and has been know to move suddenly from time to time. Learn about the different types of faults, the reasons we have earthquakes. Just remember when you feel the earth rumble - it's not my fault
geology • geophysics • earthquakes • faults • horst
The earth is a dynamic system and has been know to move suddenly from time to time. Learn about the different types of faults, the reasons we have earthquakes. Just remember when you feel the earth rumble - it's not my fault
geology • geophysics • earthquakes • faults • horst
Folded Rocks
Great forces are applied to the rocks of the earth. In places, these forces cause the rocks to fracture and break. Other times, the rocks bend and form folds
geology • geophysics • folds • anticline • syncline
Great forces are applied to the rocks of the earth. In places, these forces cause the rocks to fracture and break. Other times, the rocks bend and form folds
geology • geophysics • folds • anticline • syncline
Geologic Time
You may be familiar with the concept of time, but you have never experienced time as a geologist does. Learn about geologic time and prepare yourself to think in terms of "deep time".
geology • geophysics • time • time scale • geologic time
You may be familiar with the concept of time, but you have never experienced time as a geologist does. Learn about geologic time and prepare yourself to think in terms of "deep time".
geology • geophysics • time • time scale • geologic time
Geology as a Career
Ever wondered what a geologist does? Check out a few of the career opportunities available to geologists.
geology • geologist • job • career • geophysics
Ever wondered what a geologist does? Check out a few of the career opportunities available to geologists.
geology • geologist • job • career • geophysics
How to take good field notes.
The taking and recording of field notes is one of the most important things a geologist does when in the field. Without well written and well understood notes, further interpretation of the rocks being studied may not be possible.
geology • geophysics • earth science • field notes • observations fossils
The taking and recording of field notes is one of the most important things a geologist does when in the field. Without well written and well understood notes, further interpretation of the rocks being studied may not be possible.
geology • geophysics • earth science • field notes • observations fossils
Igneous Rocks
The next area of the rock cycle we will look at are those rocks that are formed from the fiery interior of the earth. Igneous rocks are those rocks that form from hot magma erupting from volcanoes or slowly intruding into the subsurface.
rocks • geology • geophysics • magma • ingeous
The next area of the rock cycle we will look at are those rocks that are formed from the fiery interior of the earth. Igneous rocks are those rocks that form from hot magma erupting from volcanoes or slowly intruding into the subsurface.
rocks • geology • geophysics • magma • ingeous
Introduction to Sedimentary Rocks
The most abundant type of rock on the Earth are the sedimentary rocks. Why is this so, and what are they?
geology • geophysics • earth • earth science • science
The most abundant type of rock on the Earth are the sedimentary rocks. Why is this so, and what are they?
geology • geophysics • earth • earth science • science
Metamorphic Rocks
Not all rocks occur from volcanoes, or from the deposition of sediment. Our last category of rocks from the rock cycle are those rocks that have been altered in the earth by high heat and/or pressure - Metamorphic Rocks.
geology • geophysics • metamorphic • metamorphism • rocks
Not all rocks occur from volcanoes, or from the deposition of sediment. Our last category of rocks from the rock cycle are those rocks that have been altered in the earth by high heat and/or pressure - Metamorphic Rocks.
geology • geophysics • metamorphic • metamorphism • rocks
Petroleum 2: How do they know where to drill?
Knowing how the petroleum is formed is only the first step. How do geologists know where to dig the wells that get the petroleum out of the ground
geology • geophysics • oil • gas • petroleum
Knowing how the petroleum is formed is only the first step. How do geologists know where to dig the wells that get the petroleum out of the ground
geology • geophysics • oil • gas • petroleum
Relative Time
Geologists can use several principles to help relate the sequence of events to determine the relative time scale for a particular sequence of rocks. Understanding these principles helps a geologist place the rocks within the confines of the geologic time scale.
geology • geophysics • time • geologic time • relative time
Geologists can use several principles to help relate the sequence of events to determine the relative time scale for a particular sequence of rocks. Understanding these principles helps a geologist place the rocks within the confines of the geologic time scale.
geology • geophysics • time • geologic time • relative time
Sandstones and Conglomerates
It takes a bit more than recognizing a rock is a sandstone to accurately describe it in the field.
geology • geophysics • earth • earth science • sand
It takes a bit more than recognizing a rock is a sandstone to accurately describe it in the field.
geology • geophysics • earth • earth science • sand
Sedimentary Rocks
The majority of the rocks that make up our world are sedimentary in nature. Learn about the different types of sedimentary rocks, the first stop in our understanding of the rock cycle.
geology • geophysics • earth science • sediments • sedimentary
The majority of the rocks that make up our world are sedimentary in nature. Learn about the different types of sedimentary rocks, the first stop in our understanding of the rock cycle.
geology • geophysics • earth science • sediments • sedimentary
Smoking Gun for the Permian Extinction?
New geological evidence now supports the theory that a very large (possibly 60 km in size) asteroid collided with the earth at the end of the Permian period. This impact was probably the leading cause for the extinction of nearly all life on earth at the end of the Permian.
geology • geophysics • permian • asteroids • impact
New geological evidence now supports the theory that a very large (possibly 60 km in size) asteroid collided with the earth at the end of the Permian period. This impact was probably the leading cause for the extinction of nearly all life on earth at the end of the Permian.
geology • geophysics • permian • asteroids • impact
Stratigraphy
The science of stratigraphy is important for the information it tells us about the rock record and how those rocks were originally deposited. The laws and principles set forth by early scientists help modern stratigraphers to know how sediment was originally deposited, to know which rock is older, and how to use fossils to help link different rock units to the same geologic time.
geology • geophysics • stratigraphy • uniformitarianism • superposition
The science of stratigraphy is important for the information it tells us about the rock record and how those rocks were originally deposited. The laws and principles set forth by early scientists help modern stratigraphers to know how sediment was originally deposited, to know which rock is older, and how to use fossils to help link different rock units to the same geologic time.
geology • geophysics • stratigraphy • uniformitarianism • superposition
Strike and Dip
Strike and dip are important for identifying and orientating geologic structures in the field. Understanding what strike and dip are, and how to measure them in the field are important skills for a geologist to learn.
geology • geophysics • earth science • dip • strike
Strike and dip are important for identifying and orientating geologic structures in the field. Understanding what strike and dip are, and how to measure them in the field are important skills for a geologist to learn.
geology • geophysics • earth science • dip • strike
The Rock Cycle
An understanding of geology requires us to learn how the rocks around us are formed. Learning how all the rocks we see are part of a larger cycle is the first step in understanding geology.
geology • geophysics • earth science • sedimentary • igneous
An understanding of geology requires us to learn how the rocks around us are formed. Learning how all the rocks we see are part of a larger cycle is the first step in understanding geology.
geology • geophysics • earth science • sedimentary • igneous
Unconformities
Unconformities are an important part of the stratigraphic record. They represent periods of non-deposition and erosion. Knowing how to interpret and identify unconformities can help a geologist piece together the history of the stratigraphic record, and how that sequence of rocks relates to other sequences.
geology • geophysics • stratigraphy • james hutton • nicolaus steno
Unconformities are an important part of the stratigraphic record. They represent periods of non-deposition and erosion. Knowing how to interpret and identify unconformities can help a geologist piece together the history of the stratigraphic record, and how that sequence of rocks relates to other sequences.
geology • geophysics • stratigraphy • james hutton • nicolaus steno
Understanding Time and Rock Units in Geology
Geologists use three different units to help in their study of the history of the earth. Time units represent the continuous flow of time through geologic history, rock units represent the different lithologies found across the globe, and time-rock units represent all the rocks formed worldwide during a specific period of geologic time. This week we will examine these units and how they relate to each other.
geology • geophysics • earth science • stratigraphy • time
Geologists use three different units to help in their study of the history of the earth. Time units represent the continuous flow of time through geologic history, rock units represent the different lithologies found across the globe, and time-rock units represent all the rocks formed worldwide during a specific period of geologic time. This week we will examine these units and how they relate to each other.
geology • geophysics • earth science • stratigraphy • time
Volcanoes
Volcanoes have always fascinated us, and have been a source of destruction and a source of growth. In this article I will explore the four main types of volcanoes and the differences and potential hazard from each.
geology • geophysics • volcano • volcanoes • shield volcano
Volcanoes have always fascinated us, and have been a source of destruction and a source of growth. In this article I will explore the four main types of volcanoes and the differences and potential hazard from each.
geology • geophysics • volcano • volcanoes • shield volcano
The Dominion Observatory
Looking to the heavens for guidance was common practice in history and in the present. People also looked up for time-setting, geodesics and stars at Dominion Observatory
dominion observatory • dominion astronomy observatory • dominion observatory in ottawa ontario • scientific research in canada • dr otto klotz
Looking to the heavens for guidance was common practice in history and in the present. People also looked up for time-setting, geodesics and stars at Dominion Observatory
dominion observatory • dominion astronomy observatory • dominion observatory in ottawa ontario • scientific research in canada • dr otto klotz
Underwater Archaeology
Adapting terrestrial methods, underwater archaeology allows the retrieval of clues to the past not always preserved on land.
underwater archaeology • archaeology fieldwork • maritime archaeology • marine archaeology • archaeological
Adapting terrestrial methods, underwater archaeology allows the retrieval of clues to the past not always preserved on land.
underwater archaeology • archaeology fieldwork • maritime archaeology • marine archaeology • archaeological
Earth's Interior Structure and Composition
Earth's interior structure includes the crust, mantle, inner core, and outer core. The crust and mantle are rocky. The inner and outer cores are metallic.
earth core • earth interior • earth structure • earth mantle • earth science
Earth's interior structure includes the crust, mantle, inner core, and outer core. The crust and mantle are rocky. The inner and outer cores are metallic.
earth core • earth interior • earth structure • earth mantle • earth science
Understand Plate Tectonics & Continental Drift
Plate tectonic theory grew from Wegener's continental drift hypothesis and is the unifying theory underlying modern geology and geophysics.
plate tectonics • continental drift • geology • geophysics • earthquake
Plate tectonic theory grew from Wegener's continental drift hypothesis and is the unifying theory underlying modern geology and geophysics.
plate tectonics • continental drift • geology • geophysics • earthquake
Arctic National Wildlife Refuge - Part 2
The potential dangers associated with oil exploration and drilling are a threat to the delicately balanced ecosystem of the refuge. Should we allow the destruction of a pristine wilderness for the sake of a few million barrels of oil?
geology • geophysics • oil • gas • petroleum
The potential dangers associated with oil exploration and drilling are a threat to the delicately balanced ecosystem of the refuge. Should we allow the destruction of a pristine wilderness for the sake of a few million barrels of oil?
geology • geophysics • oil • gas • petroleum
Arctic National Wildlife Refuge Part 1
Looking at the facts about ANWR. How much oil is there and is it worth it to get it out of the ground?
geology • geophysics • usgs • geological survey • anwr
Looking at the facts about ANWR. How much oil is there and is it worth it to get it out of the ground?
geology • geophysics • usgs • geological survey • anwr
Book Review of Krakatoa, The Day the World Exploded August 27, 1883
A review of the book by Simon Winchester.
geology • geophysics • earth • science • earth science
A review of the book by Simon Winchester.
geology • geophysics • earth • science • earth science
Bowen's Reaction Series
How does magma become the igneous rocks we see? Norman Bowen identified one possible method for the evolution of magmas.
geology • geophysics • bowen • norman bowen • bowen's reaction series
How does magma become the igneous rocks we see? Norman Bowen identified one possible method for the evolution of magmas.
geology • geophysics • bowen • norman bowen • bowen's reaction series
Igneous Intrusive Bodies
Magma rising from the Earth's interior isn't an indistinct blob, but takes on distinct shapes. Depending on the composition of the igneous rock, and the overlying geology there are several shapes an intruding igneous body can take
geology • geophysics • igneous • rock cycle • intrusion
Magma rising from the Earth's interior isn't an indistinct blob, but takes on distinct shapes. Depending on the composition of the igneous rock, and the overlying geology there are several shapes an intruding igneous body can take
geology • geophysics • igneous • rock cycle • intrusion
Igneous Rock Identification (Advanced)
More detailed diagrams to help you in identifying igneous rocks.
geology • geophysics • earth science • igneous • igneous rocks
More detailed diagrams to help you in identifying igneous rocks.
geology • geophysics • earth science • igneous • igneous rocks
Igneous Rock Identification (Basic)
A basic key to get you started on identification of igneous rocks.
geology • geophysics • igneous • igneous rocks • granite
A basic key to get you started on identification of igneous rocks.
geology • geophysics • igneous • igneous rocks • granite
Mars Close Approach
Mars made its closest approach to Earth in over 60,000 years last week. Why does Mars capture the attention of scientists and other people so much?
geology • geophysics • earth science • science • planetary science
Mars made its closest approach to Earth in over 60,000 years last week. Why does Mars capture the attention of scientists and other people so much?
geology • geophysics • earth science • science • planetary science
Mineral Identification
Minerals have always fascinated people, whether from a finely cut diamond or panning for gold. But how do geologist know what to call the different minerals they find? This article explores several of the common tests used by geologists to help them identify minerals.
geology • geophysics • minerals • mineralogy • gold
Minerals have always fascinated people, whether from a finely cut diamond or panning for gold. But how do geologist know what to call the different minerals they find? This article explores several of the common tests used by geologists to help them identify minerals.
geology • geophysics • minerals • mineralogy • gold
Mudrocks
The most abundant type of rock on the Earth, but also the most difficult to classify. Learn about some simple ways to tell your claystone from your mudstone.
geology • geophysics • earth science • earth • sediment
The most abundant type of rock on the Earth, but also the most difficult to classify. Learn about some simple ways to tell your claystone from your mudstone.
geology • geophysics • earth science • earth • sediment
Native Elements
Explore the world of the native elements. Their rarity and uses make them some of the most important minerals in the world.
geology • geophysics • earth science • earth • mineral
Explore the world of the native elements. Their rarity and uses make them some of the most important minerals in the world.
geology • geophysics • earth science • earth • mineral
New Mexico Museum of Natural History & Science
The New Mexico Museum of Natural History & Science is located in historic Old Town in Albuquerque New Mexico. The natural history museum has been one of my favorite museums ever since I first visited it in 1987.
geology • geophysics • museums • museum • new mexico
The New Mexico Museum of Natural History & Science is located in historic Old Town in Albuquerque New Mexico. The natural history museum has been one of my favorite museums ever since I first visited it in 1987.
geology • geophysics • museums • museum • new mexico
Petroleum 3 - How do they get it out of the ground?
We know how oil is formed, and we know how geologists search for petroleum deposits. But how do the oil companies get the oil out of the ground?
geology • geophysics • petroleum • oil • gas
We know how oil is formed, and we know how geologists search for petroleum deposits. But how do the oil companies get the oil out of the ground?
geology • geophysics • petroleum • oil • gas
Sandstone Classification
Once we can describe a sandstone in the field we need to give it a name. Find out how to name a sandstone in three easy steps.
geology • geophysics • earth science • earth • science
Once we can describe a sandstone in the field we need to give it a name. Find out how to name a sandstone in three easy steps.
geology • geophysics • earth science • earth • science
Seafloor Spreading, Part 1
A revolution spread through the science of geology in the 1960’s and culminated in the theory of plate tectonics. The theory was supported by key research conducted in and under the world’s oceans that led to the idea of seafloor spreading.
geology • geophysics • earth • science • earth science
A revolution spread through the science of geology in the 1960’s and culminated in the theory of plate tectonics. The theory was supported by key research conducted in and under the world’s oceans that led to the idea of seafloor spreading.
geology • geophysics • earth • science • earth science
Seafloor Spreading, Part 2
The theory of seafloor spreading required many pieces of evidence to convince a highly skeptical audience. In the end Harry Hess and others found four primary keys that helped shape the theory.
geology • geophysics • earth • science • earth science
The theory of seafloor spreading required many pieces of evidence to convince a highly skeptical audience. In the end Harry Hess and others found four primary keys that helped shape the theory.
geology • geophysics • earth • science • earth science
How I wandered into engineering: My mother's part
I have received a few questions about what led me to engineering. My mother was the one who contributed most tomy interest in most fields, through her work and her enthusiasm for finding answers to my incessant questions.
engineering • geology • drafting • work • science
I have received a few questions about what led me to engineering. My mother was the one who contributed most tomy interest in most fields, through her work and her enthusiasm for finding answers to my incessant questions.
engineering • geology • drafting • work • science
Causes & Effects of Water Pollution
What are the facts about water pollution? What are the water pollution solutions? How can readers find out about water pollution in their area?
causes of water pollution • effects of water pollution • what is the clean water act • water pollution solutions • facts about water pollution
What are the facts about water pollution? What are the water pollution solutions? How can readers find out about water pollution in their area?
causes of water pollution • effects of water pollution • what is the clean water act • water pollution solutions • facts about water pollution
Earth's Density and Interior Composition
Density is one of the tools scientists use to indirectly deduce the interior structure and composition of Earth and other planets.
earth interior structure • density • mass density • density units • bulk density
Density is one of the tools scientists use to indirectly deduce the interior structure and composition of Earth and other planets.
earth interior structure • density • mass density • density units • bulk density
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