CHILD DEVELOPMENT PEDAGOGY

Detailed explanation-1: -index fossil, any animal or plant preserved in the rock record of the Earth that is characteristic of a particular span of geologic time or environment. A useful index fossil must be distinctive or easily recognizable, abundant, and have a wide geographic distribution and a short range through time.

Detailed explanation-2: -Index fossils (also known as guide fossils or indicator fossils) are fossils used to define and identify geologic periods (or faunal stages). Index fossils must have a short vertical range, wide geographic distribution and rapid evolutionary trends.

Detailed explanation-3: -Bryozoans are often used as index fossils because they are abundant in many types of sedimentary rocks and are useful for determining the ages of marine and freshwater rocks.

Detailed explanation-4: -Index fossils are the remains of plants and animals that lived for a limited period. Best index fossils are common, widely distributed, and easy to identify. Some of the most common index fossils are ammonites, trilobites, and graptolites.

Detailed explanation-5: -The best known index fossil is the ammonite, an ocean-dwelling cephalopod, somewhat like a shelled squid or octopus. The ammonite’s wide geographic distribution, rapid evolution, and distinctive features make it a model index fossil!