Question

On a geologic map, cratonic basins, where thick sequences of sedimentary rocks overly the Precambrian basement, show the _________ rocks toward the center of the basin.

Answer 1

On the geological maps in question, the cratonic basins that contain thick sequences of sedimentary rocks which overly the Precambrian basement, show the youngest rocks toward the center of the basin.

Geological maps are tools created and used by scientists to show the arrangement of the geological elements of a specific area. This can include:

• Rock types
• Cracks and faults
• Minerals
• Groundwater
• Ages

and much more, depending on the area and detail of the map created.

On a detailed geo-map, we can understand not only the area we are initially standing on but also where to find geological areas with similar sediment compositions and information on the age of the rocks. This is done due to the way the map stacks the units in terms of age, from the youngest at the top to the oldest at the bottom.

Cratonic basins are areas where geological elements are widely distributed and often filled with shallow water as well as sedimentary rocks. The rocks at the center of these basins show the youngest rocks at the center due to the previously mentioned aging sequence used by the maps.

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