STUDIYING THE HISTORY OF EARTH

Facies fossils are those which

• Are in the first stratigraphic record.

• Have several axes of symmetry and several faces.

• Have been affected by geological processes following sedimentation.

• Come from living things that could only live in a very specific environment.

The stratigraphic record originates:

• From the movements of the Earth's crust in earthquakes.

• From the movement of the continental plates.

• From the study of all the above elements.

• From the evolution of the sedimentary basins.

The strata of a stratigraphic sequence:

• Were formed in another basin and have temporal continuity.

• Were formed in the same basin and have temporal continuity.

• Were formed in another basin and do not have temporal continuity.

• Were formed in the same basin and do not have temporal continuity.

Stratigraphic series consist of two or more sequences separated by:

• Stratigraphic borders.

• Stratigraphic discontinuities.

• Upper and lower basements.

• Stratification planes.

The process that transforms the layers of sediments into layers of sedimentary rocks and fossilises the remains or traces of living organisms buried in them is called:

• Lithospheric dynamics.

• Stratigraphy.

• Sedimentary evolution.

• Diagenesis.

If we see petrified marks such as the ripples formed by the tide on the beach, which principle will we apply to draw conclusions?

• Succession of geological events.

• Original horizontality.

• Stratigraphic structure.

• Actualism.

The sequences of a stratigraphic series:

• Have temporal continuity and were formed in the same basin.

• Do not have temporal continuity and do not need to be formed in the same basin.

• Have temporal continuity and do not need to be formed in the same basin.

• Do not have temporal continuity and were formed in the same basin.

A stratigraphic correlation consists of:

• Comparing the lithology of two stratigraphic series in order to establish the time equivalence between the strata.

• Comparing the fossils of two or more stratigraphic series in order to establish the time equivalence between the strata.

• None of the above.

• Comparing the fossils and the lithology of two or more stratigraphic series in order to establish the time equivalence between the strata.

Relative dating is achieved:

• Using all the above methods.

• Applying the basic principles of stratigraphy.

• By archaeological study.

• By radiometric method.

The factors that alter the stratigraphic record are:

• Weathering and erosion.

• The location and environment of the sedimentary rocks, lithospheric dynamics and the action of the processes of relief modelling.

• None of the above.

• Lithospheric and atmospheric dynamics.