0
A rock unit that cross cuts another rock unit is younger than the rock through which it cuts
Wiki User
∙ 14y ago
Wiki User
∙ 14y agoYes. During emplacement via magma, they fill voids and displace the rock that already is in place.
Add your answer:
Earn +20 pts
Extrusive rocks which cool more rapidly than intrusive rocks generally have?
Extrusive rocks which cool more rapidly than intrusive rocks generally have smaller crystals.
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 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.
How does the rate of cooling influence crystal size of igneous rocks and how does that help you to distinguish between intrusive and extrusive igneous rocks?
The longer that magma is able to cool, the larger the crystals will be. Intrusive rocks will have larger crystals than extrusive rocks. For example granite (intrusive) has larger grains than rhyolite (extrusive).
What principal involves an intrusive rock body younger than the rock into which it intrudes?
principle of original horizontality
Extrusive rocks which cool more rapidly than intrusive rocks generally have?
Extrusive rocks which cool more rapidly than intrusive rocks generally have smaller crystals.
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.
Does intrusive rocks have smaller minerals than extrusive rocks?
No. Intrusive rocks have larger crystals because the magma would have taken longer to cool and solidify than extrusive magma.
Why is intrusive rock harder than a extrusive igneous rock?
The rocks are underground so intrusive rocks are under pressure so its harder.
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.
How does the rate of cooling influence crystal size of igneous rocks and how does that help you to distinguish between intrusive and extrusive igneous rocks?
The longer that magma is able to cool, the larger the crystals will be. Intrusive rocks will have larger crystals than extrusive rocks. For example granite (intrusive) has larger grains than rhyolite (extrusive).
Is this true or false Intrusive rocks have smaller crystals than extrusive rocks?
Generally, false. Intrusive rocks cool far more slowly than extrusive ones, so the crystals have time to grow larger.
What are extrusive rocks and intrusive rocks?
Extrusive rocks are formed outside of earths surface. Intrusive rocks are formed inside earths surface.
Why would you expect the crystals in an intrusive rock to be larger than the crystals in an extrusive rock?
Because intrusive rocks cool more slowly which makes the rocks larger.
Why is intrusive rock usually harder than extrusive rock?
Intrusive rocks are under pressure so they are usually harder.
Why igneous rocks and faults are younger than the rocks they cut across?
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.
Is the following sentence true or false Intrusive rocks have similar crystals than extrusive rocks?
Rocks usually contain a mixture of minerals.
