<u>Stromatolites are layered mounds of calcium carbonate that were deposited by algae during the Precambrian time.</u>
Answer: Option C
<u>Explanation:</u>
Stromatolites are the deposit of the layer which is mostly of limestone and these are mainly formed by the blue green algae which are only one celled organism of primitive times.
The features of these are that they are normally thin and have layers that might be either light or dark in color and are either flat or some of them even have a shape of a dome.
B, solstice. without the change in he earth’s axis there would be no difference in seasons therefore solatices
Scientists now know all know that the earthquakes are caused by faults and they look at the ground for this activity, thus means that by doing this they knew more and more of the earth.
