Structure involving porphyroblasts is ________

</p><p>Rocks formed due to alteration of original structure due to heat and excessive pressure are called __…

What is the average grain size of rudaceous rocks?

When the vents of quiet volcanoes become sealed with intrusions it leads to __________

Each layer of a laminated structure of sedimentary rock is called ________

The process not contributing to clastic rocks is _________

Granite is an example of _______.</p>

The other name for brown coal is ________