Rock relative dating to determine fault
A-horizon - The uppermost layer of a soil, containing organic material and leached minerals.
abyssal plain - The ocean floor offshore from the continental margin, usually very flat with a slight slope.
Please remember that all dating methods, even those termed "absolute," are subject to margins of error. That is a very small amount of possible error range. Modern studies almost always use two or more methods to confirm dating work and to build confidence in the results obtained.
Overview of Methods Superposition Stratigraphy Dendrochronology Radiocarbon C14 Radiometric Dating Methods Obsidian Hydration Dating Paleomagnetic/Archaeomagnetic Luminescence Dating Methods Amino Acid Racemization Fission-track Dating Ice Cores Varves Pollens Corals Cation Ratio Fluorine Dating Patination Oxidizable Carbon Ratio Electron Spin Resonance Cosmic-ray Exposure Dating This is an excellent overview of dating methodologies, and is a chapter in a textbook on Archaeology.
alkali metal - A strongly basic metal like potassium or sodium.
alkaline - Term pertaining to a highly basic, as opposed to acidic, substance.
accrete - To add terranes (small land masses or pieces of crust) to another, usually larger, land mass. age - A unit of geological time shorter than an epoch, usually lasting several million years.
aeolian process - A geological modification, such as sand dunes or erosion, caused by wind activity. algal mat - A layered communal growth of algae observed in fossils and in present day tidal zones associated with carbonate sedimentation.
Dating is not necessary to demonstrate that evolution is a fact.Therefore newer sediment is continually deposited on top of previously deposited or older sediment.The Principle of Original Horizontality states that due to the influence of gravity all sediment is originally deposited horizontally.Geology provides the primary evidence for plate tectonics, the evolutionary history of life, and the Earth's past climates.Geologists use a wide variety of methods to understand the Earth's structure and evolution, including field work, rock description, geophysical techniques, chemical analysis, physical experiments, and numerical modelling.