An Igneous Structure Produced by Deep- Seated, Extremely Gaseous, Highly

question 17

Multiple Choice

An igneous structure produced by deep- seated, extremely gaseous, highly explosive eruptions is:

• A) a diapir.
• B) a batholith.
• C) a dike.
• D) a diatreme.

---

Definitions:

Herfindahl Index

An index that gauges the proportions of entities in a market sector, highlighting the extent of competition among them.

Pure Monopolist

A market structure where a single company is the sole provider of a product or service, with no close substitutes, giving it significant control over price.

Herfindahl Index

A measure of market concentration to assess the competitive landscape, calculated by summing the squares of the market shares of all firms in the industry.

Concentration Ratio

A measure used to assess the degree of market concentration, quantifying the market share held by the largest firms within an industry.