What is/are related to jointed rocks?

When the thickness is greater than 20 cm, the veins area called _______

Sheet joints are caused not due to _______

The type of joint occurring in igneous rocks during cooling is _______

What is a positive effect of joints?

Contraction or shrinkage is the cause of which joints?

What are the continuous joints also called?

How are the main joints aligned to the cooling surface?