dating of rocks (my questions)
Cards (35)
- Types of dating of rocks
- Relative dating
- Absolute dating
- Stratigraphy
- scientific discipline
- description of rock successions and their interpretation in terms of a general time scale
- Stratigraphy
- scientific discipline
- description of rock successions and their interpretation in terms of a general time scale
- Stratigraphy
- scientific discipline
- description of rock successions and their interpretation in terms of a general time scale
- Rock layers
- or strata are found throughout the Earth
- most rocks are sedimentary rocks that are formed from weathered old rocks
- Rock layers
- or strata are found throughout the Earth
- most rocks are sedimentary rocks that are formed from weathered old rocks
- Rock layers
- or strata are found throughout the Earth
- most rocks are sedimentary rocks that are formed from weathered old rocks
- Rock layers (youngest to oldest)
- paleaozoic
- proterozoic
- archean
- Rock layers
- sediment examples are gravel, sand, mud that bury dead plants and animals
- how its made particles accumulate and become rocks and organisms buried with them become fossils
- Rock layers
- sediment examples are gravel, sand, mud that bury dead plants and animals
- how its made particles accumulate and become rocks and organisms buried with them become fossils
- Rock layers (youngest to oldest)
- paleaozoic
- proterozoic
- archean
- relative dating
- compares chronologic sequence of a rock, fossil or geologic feature without using a number
- used to determine age of rock relative to rock units around it
- relative dating
- compares chronologic sequence of a rock, fossil or geologic feature without using a number
- used to determine age of rock relative to rock units around it
- principles of relative dating
- geologists use these guides to determin the relative order that geological events occured
- uniformatarianism
- original horizontality
- superposition
- lateral continuity
- cross cutting
- inclusions
- uncomformity
- principles of relative dating
- geologists use these guides to determin the relative order that geological events occured
- uniformatarianism
- original horizontality
- superposition
- lateral continuity
- cross cutting
- inclusions
- uncomformity
- unformitarianism
- changes in earths crust result from continuous and uniform processes
- processes such as storm, earthquake, vocanism, weathering
- ripple marks are formed by flow of water over sand
- unformitarianism
- changes in earths crust result from continuous and uniform processes
- processes such as storm, earthquake, vocanism, weathering
- ripple marks are formed by flow of water over sand
- original horizontality
- sediments are deposited in flat, horizontal layers parallel to earths surface
- not horizontal rock layers have been altered by tectonic forces such as folding or faulting
- original horizontality
- sediments are deposited in flat, horizontal layers parallel to earths surface
- not horizontal rock layers have been altered by tectonic forces such as folding or faulting
- superposition
- any undisturbed sequence of strata
- younger rock layers lie on top of olde rock layers
- superposition
- any undisturbed sequence of strata
- younger rock layers lie on top of olde rock layers
- lateral continuity
- rock layers extend horizontally in all directions
- befor separation, there is lateral contuity
- breaks or separations are caused by barriers at time of deposition or erosion
- breaks happen after layering and then sediments are placed in the gap
- lateral continuity
- rock layers extend horizontally in all directions
- befor separation, there is lateral contuity
- breaks or separations are caused by barriers at time of deposition or erosion
- breaks happen after layering and then sediments are placed in the gap
- cross cutting
- involves features that cut across older rocks which are intrusions, faults
- younger than the units it cuts through
- intrusions are magma going up
- fracture is a crack in the rock
- fault is a fracture along which movement has occured
- cross cutting
- involves features that cut across older rocks which are intrusions, faults
- younger than the units it cuts through
- intrusions are magma going up
- fracture is a crack in the rock
- fault is a fracture along which movement has occured
- inclusions
- old rock pieces inside younger rocks
- inclusions
- old rock pieces inside younger rocks
- uncomformity
- surface of erosion or non-deposition that separates rock layers of different ages
- uncomformity
- surface of erosion or non-deposition that separates rock layers of different ages
- absolute dating
- used to determine age of rock in millions of years before present
- radiometric dating is a technique that uses radioactive isotopes of elements in the rock to estimate its age
- isotopes are atoms of an element that differ in number of electrons and atomic weight
- radioactive isotopes are unstable and decay, meaning it spontaneously change from an unstable to stable form
- absolute dating
- used to determine age of rock in millions of years before present
- radiometric dating is a technique that uses radioactive isotopes of elements in the rock to estimate its age
- isotopes are atoms of an element that differ in number of electrons and atomic weight
- radioactive isotopes are unstable and decay, meaning it spontaneously change from an unstable to stable form
- half life
- amount of time it takes for 50 % of radioactive parent isotope to decay to daughter isotope
- half life
- amount of time it takes for 50 % of radioactive parent isotope to decay to daughter isotope
- radioactive decay
- natural breakdown of an unstable, radioactive element into a stable element
- happens at a predictable rate, which makes it useful for determining the age of an object containing a radioactive element
- radioactive decay
- natural breakdown of an unstable, radioactive element into a stable element
- happens at a predictable rate, which makes it useful for determining the age of an object containing a radioactive element