why 75% of the rocks on the earths surface are sedimentary rocks?

Answer 1

because sedimentary rock is the surface rock.
When mountains are first formed, they are tall and jagged like the Rocky Mountains on the west coast of North America.
Over time (millions of years) mountains become old mountains like the Appalachian Mountains
on the east coast of Canada and the United States.
When mountains are old, they are rounded and much lower.
What happens in the meantime is that lots of rock gets worn away due to erosion.
Rain, freeze/thaw cycle, wind and running water cause the big mountains to crumble a little bit at a time.

Eventually most of the broken bits of the rock end up in the streams & rivers that flow down from the mountains.
These little bits of rock & sand are called sediments.
When the water slows down enough, these sediments settle to the bottom of the lake or oceans they run into.
Over many years, layers of different rock bits settle at the bottom of lakes and oceans.

Think of each layer as a page in a book. One piece of paper is not heavy.
But a stack of telephone books is very heavy & would squish anything that was underneath.
Over time the layers of sand and mud at the bottom of lakes & oceans turned into rocks.
These are called sedimentary rocks.

Some examples of sedimentary rocks are sandstone and shale. Sedimentary rocks have fossils in them.
Plants & animals that have died get covered up by new layers of sediment and are turned into stone.
Most of the fossils we find are of plants & animals that lived in the sea. They just settled to the bottom.
Other plants & animals died in swamps, marshes or at the edge of lakes.
They were covered with sediments when
the size of the lake got bigger.

When large amounts of plants are deposited in sedimentary rocks, then they turn into carbon.
This gives us our coal, oil, natural gas and petroleum.
A large sea once covered the central part of Canada and the climate was very tropical.
In time, sedimentary rocks formed there.
That is why we find dinosaur fossils in Alberta and the area is a good source of natural fuels.

Sedimentary rocks cover 75% of the earth’s surface.
Most of the rocks found on the Earth’s surface is sedimentary even though sedimentary rocks
only make up less than 5% of all the rocks that make up Earth.
When rocks are exposed to the elements – air, rain, sun, freeze/thaw cycle, plants –
erosion occurs and the little bits of rock worn away get deposited as sediments.
Over time, these sediments harden as they get buried by more sediments and turn into sedimentary rocks.
Sedimentary rocks are usually formed in layers called strata.
There are 6 main kinds of sedimentary rocks depending on the appearance of the rock.
Conglomerate rock has rounded rocks (pebbles, boulders) cemented together in a matrix.
Sandstone is a soft stone that is made when sand grains cement together. Sometimes the sandstone is
deposited in layers of different colored sand.
Shale is clay that has been hardened and turned into rock. It often breaks apart in large flat sections.
Limestone is a rock that contains many fossils and is made of calcium carbonate &/or microscopic shells.
Gypsum, common salt or Epsom salt is found where sea water precipitates the salt as the water evaporates.
Porphory rock is when jagged bits of rock are cemented together in a matrix.

Answer 2

A world wide flood would explain why the earths surface is composed of 75% to 80% of the surface being covered with sediment or sedimentary rock.

Answer 3

All over the world we can see the sedimentary rocks. At many places in mountains those layers are bent over from horizontal orientation to vertical layers. In many layers we can find fossilized animals and plants. The theory of very slow depositing over thousand and millions of years does not support the following findings:
- Fossils were captured quickly by sand and covered with additional layers so that oxygen was excluded before the animals and plants were able to decay.
- Many high mountains show evidence that they were not there when all the sediments formed to make the rock that is now found up at 10'000 or 15'000 ft above sea level. The bent layers of different sediment rock is evidence that those mountains were folded up while the sediments of dozens of layers were still soft and hardened thereafter.

Many of those facts are ignored by geological science because they do not fit into the preconceived model.

Answer 4

I swear it wasn't me who put them there.