when the rock is more rounded than the others
Basalt rocks have been identified on the Moon, Mars, and the asteroid Vesta. These rocks are often formed from solidified lava flows and are commonly found in volcanic regions.
This question has already been asked. The longest river in Italy is named 'Po'
River stones are typically sedimentary rocks like sandstone, limestone, or shale that have been smoothed and rounded by the action of water in rivers over time. They can also include igneous rocks such as granite or basalt that have eroded from upstream sources and been transported by the river.
The Danube has been Austria's longest river for a suprising long time of 100 years at the most .
BASALT is for igneous. SLATE is for metamorphic. LIMESTONE is for sedimentary.
In the tundra, you can find a variety of rocks such as granite, gneiss, schist, and basalt. These rocks have been shaped by the extreme cold temperatures and freeze-thaw cycles that are typical of tundra environments.
The Loire river is the longest river of France runs about 630 miles.
The longest river in the world is the Nile River. And the widest river in the world the world is the Amazon River! did you no that the amazon river has never been crossed and there is no bridge built long enough to cross it up until now ! anyway so there is your answer and more! biie=]
Basalt itself is not inherently magnetic, but it can contain magnetic minerals such as magnetite. These minerals can make some basaltic rocks exhibit magnetism, especially when they have been cooled from molten lava. The magnetic properties of basalt can also be influenced by the conditions under which it formed and the presence of other minerals. Overall, while basalt can have magnetic characteristics, it is not universally magnetic.
They have been deposited there after being weathered and eroded from their point of origin.
There has been an ongoing disagreement as to whether the Amazon or the Nile is the worlds longest river, however some researchers accept the Amazon as being longer because of it's source.
Essentially, the only types of rock that can stand up to this type of erosion are igneous and metamorphic rocks. I am not certain there is a technical or scientific term for this type of rock, but the colloquial or "slang" term for them is river rocks.