Question

Fossils in

layers of rock are generally estimated to be
than fossils found in the upper layers.
older, younger
Onewer, younger
older, older
newer, older

Answer 1

HI the answer is B. newer, younger

Step-by-step explanation:

Why you may ask, well the answer is very obvious you see the newer the fossil the younger it is. If you want a more scientific and discrete explanation read the following below.

The geological time scale is used by geologists and paleontologists to measure the history of the Earth and life. It is based on the fossils found in rocks of different ages and on radiometric dating of the rocks.

Sedimentary rocks (made from mud, sand, gravel or fossil shells) and volcanic lava flows are laid down in layers or beds. They build up over time so that that the layers at the bottom of the pile are older than the ones at the top. Geologists call this simple observation the Principle of Superposition, and it is most important way of working out the order of rocks in time. Ordering of rocks (and the fossils that they contain) in time from oldest to youngest is called relative age dating.

Answer 2

Fossils in older layers of rock are generally estimated to be older than fossils found in the upper layers.

Step-by-step explanation:

The fossils that forms the layers are the fossil layers in the sedimentary rocks. These will be forming layer by layer. The sediments will be getting deposited layer by layer. These sediments are those materials that are the broken pieces if rocks, sand,pebbles,silt,animals,dead things,etc. They will get deposited as they are carried like sediments.

These gets deposited above each other forming different layers. The layers that are formed on the top side will have larger weight thereby it presses the layers in the bottom side. This will be resulting in the rock formation. Thus the Fossils in the older layers of a rock are older fossils than the fossils that are found in the upper layers.