Answer. Answer: The layers of rocks are related with each other because they work as one to form one. One cannot work without a support.

The layers were originally horizontal. Explanation: We will be correct to say that both layers 2 and 4 were originally horizontal. As with all sedimentary beds, they are originally laid horizontally in their basin of deposition.

Law of superposition, a major principle of stratigraphy stating that within a sequence of layers of sedimentary rock, the oldest layer is at the base and that the layers are progressively younger with ascending order in the sequence.

The process of showing that rocks or geologic events occurring at different locations are of the same age is called correlation. They aid the geologist in correlating sedimentary rock layers. OBJECTIVE: You will be able to construct a geologic history of a region by observing rock layers in different localities.

Explain why some rock layers can be missing from the sequence in some outcrops. They were weathered and eroded or never deposited. reconstruct a sequence of events? We de not need to walk, dig, or identify layers or fossils.

The principle of cross-cutting relationships states that a fault or intrusion is younger than the rocks that it cuts through. So the fault must be the youngest formation that is seen. The intrusion (D) cuts through the three sedimentary rock layers, so it must be younger than those layers.

Over time, the sediments pile up to form horizontal layers of sedimentary rocks. The bottom layer of rock forms first, which means it is oldest. Each layer above that is younger, and the top layer is youngest of all.

It is older than layer J. Because of the principle of superposition, this states that sedimentary rocks become younger from bottom to top. The fault is older than layer I because of the principle of original horizontality; the sediment usually accumulates in horizontal layers.

Is the extrusion older or younger than rock layer B? The extrusion is younger because extrusions are always younger than the rock layers below them.

*The Law of Superposition is that an undeformed sedimentary rock layer is older than the layers about it and younger than the layers below it. According to the Law of Superposition, layer 1 was the first layer deposited, and thus the oldest layer.

The rock sequence from oldest to youngest is; O, H, B, L, J, A, F, M, D, G, N, E, I, C, K. The relationship between H and O is that O is older than H.

granite rock

Layered rocks form when particles settle from water or air. Steno’s Law of Original Horizontality states that most sediments, when originally formed, were laid down horizontally. Rock layers are also called strata (the plural form of the Latin word stratum), and stratigraphy is the science of strata.

There are three main types of rocks: sedimentary, igneous, and metamorphic. Each of these rocks are formed by physical changes—such as melting, cooling, eroding, compacting, or deforming—that are part of the rock cycle. Sedimentary rocks are formed from pieces of other existing rock or organic material.

The location of fossils in rock layers provides evidence of Earth’s past landscapes. It is hard to guess the age of rock. Scientists have to act like detectives, piecing together a mystery to determine how long ago rocks formed. Fossils found in a particular rock layer help scientists determine the age of the rock.

Igneous intrusions form when magma cools and solidifies before it reaches the surface. Three common types of intrusion are sills, dykes, and batholiths (see image below).

Thickness in geology and mining refers to the distance across a packet of rock, whether it be a facies, stratum, bed, seam, lode etc. The concept of thickness came originally from mining language, where it was used mainly to indicate the workability of seams.

Scientists use the rock layers to help them figure out the history of the planet. By investigating the layers, they also uncover fossils of organisms that lived in the past.

Layer 8 is older than layer 1. Layer 3 is younger than layer 6. Layer 4 and layer 10 are the same relative age. Layer 2 and layer 9 are the same relative age.

Stratification

507 million years

Index Fossils can be used to determine if two rock layers were deposited at the same time.