0
Why igneous rocks and faults are younger than the rocks they cut across?
Wiki User
∙ 9y ago
They are formed from hardened lava which comes up from the ground and hardens inside the rock, which happens of course after the other rocks have already formed.
Wiki User
∙ 9y ago
Add your answer:
Earn +20 pts
What is the relative age relationship of faults to the rocks they cut?
Because the rocks have to be there first, all faults are younger than the rocks they end up cutting across. In regard to sedimentary rock layers, each layer is younger than the one below it.
What are the reative age relationship of faults the rocks they cut?
Faults are always younger than the rocks they cut. They cannot be older that the rocks they are cutting, because the rocks would not be there.
An igneous body younger than the rocks above and below?
sill
What is the principle of cross cutting relationships?
Crosscutting includes fractures (cracks in rocks), faults (fractures where movement has occurred), or masses of magma that cut across preexisting rocks before cooling. Any crosscutting feature must be younger than the rock or sediment it cuts across.
Are rock layers always younger than the faults that cut across them?
If the situation is as simple as the one you have stated, it isn't difficult. Meanwhile, many faults displace laterally, either in compression or tension so that it can appear that younger rocks overlie older ones. See the law of super-position. Compressive faults generally force younger rocks below older, but not always. See subduction zones. Then see ophiolite suites.
When molten rocks cools what rocks form?
igneous rocks
Sheets of igneous rock that cut across other rocks layers?
Dykes.
Fossils found in younger rocks?
The youngest rocks would be igneous, those created by cooling magma. Impossible to find a fossil there.
Why is an igneous intrusion younger than the rocks in which it is found?
The melted rock of the igneous intrusion pushed its way into cracks and made previously existing rock weaker. The intrusions only became rock when they cooled and solidified, therefore they are younger than the rocks in which they are embedded.
What has the author Donald Clarence Ross written?
Donald Clarence Ross has written: 'Petrographic and chemical reconnaissance study of some granitic and gneissic rocks near the San Andreas fault from Bodega Head to Cajon Pass, California' -- subject(s): Granite, Geochemistry, Gneiss 'Basement-rock correlations across the white Wolf-Breckenridge-southern Kern Canyon fault zone, southern Sierra Nevada, California' -- subject(s): Stratigraphic correlation, Faults (Geology), Batholiths 'Magnetic susceptibilities of modally analyzed granitic rocks from the southern Sierra Nevada, California' -- subject(s): Granite, Igneous Rocks, Magnetic properties, Rocks, Igneous 'Hornblende-rich, high grade metamorphic terranes in the southernmost Sierra Nevada, California, and implications for crustal depth and batholith roots' -- subject(s): Hornblende 'Generalized geologic map of the basement rocks of the southern Sierra Nevada, California' -- subject(s): Maps, Geology, Petrology 'Igneous and metamorphic rocks of parts of Sequoia and Kings Canyon National Parks, California' -- subject(s): Igneous Rocks, Metamorphic Rocks, Petrology, Rocks, Igneous, Rocks, Metamorphic, Igneous rocks, Crystalline rocks 'Possible correlations of basement rocks across the San Andreas, San Gregorio-Hosgri, and Rinconada-Reliz-King City faults, California' -- subject(s): Faults (Geology), Geology, Structural, Structural Geology 'The metamorphic and plutonic rocks of the southernmost Sierra Nevada, California, and their tectonic framework' -- subject(s): Igneous Rocks, Metamorphic Rocks, Rocks, Igneous, Rocks, Metamorphic 'Descriptive petrography of three large granitic bodies in the Inyo Mountains, California' -- subject(s): Analysis, Igneous Rocks, Petrology, Rocks, Igneous 'Granitic rock modal data from the southern Sierra Nevada, California' -- subject(s): Petrology, Granite
What are igneous rocks that form over the surface?
Rhyolititcen rocks.
The idea that an igneous rock is younger than the rocks it has intruded is stated in the law of?
Cross Cutting Relationships
