A big rock is a boulder.
It's called an erratic. See http://en.wikipedia.org/wiki/Glacial_erratic.
A giant rock is called a Boulder/Boulders.a stone what else.
A Boulder, or Talus, Cave is simply an enterable void or set of voids between boulders and the rock-face from which they have fallen. Collapses within existing karst, sea or lava caves may choke the passage or chamber with boulders, and such chambers are often called "boulder chambers", but that does not form the cave, and it is not the same as a true boulder cave.
The boulder fell on my head
it is called an Erratic
A big rock is a boulder.
Sure, a boulder is a large rock.
Boulder is the name of a city in Colorado, USA. Also, a boulder is a VERY large rock.
The city of Boulder is located in Colorado and is also a word to describe a large rock. Boulder is located 29 miles from Denver.
Erratic
Erratic
Erratic
A boulder
It was called Boulder Dam.
The meaning of the word boulder is a very large stone or a rock. This word is known as a noun. That is the meaning of the word boulder.
a boulder