Interpret the diagram of brachiopod vs. bivalve diversity over time below.Compare their diversity before and after the Paleozoic-Mesozoic boundary.What happened at the Paleozoic-Mesozoic boundary? **Brachiopod and Bivalve Diversity Over Time**(Source: Gould and Calloway, 1980)This graph illustrates the diversity of brachiopod and bivalve genera over three geological eras: Paleozoic, Mesozoic, and Cenozoic. The vertical axis represents the number of genera, ranging from 0 to 700, while the horizontal axis is divided into three time periods.- **Paleozoic Era:** During this era, the number of brachiopod genera (gray line) is notably higher than that of the bivalve genera (black line).- **Mesozoic Era:** Both groups show a decline initially, but bivalve genera begin to outnumber brachiopod genera as time progresses.- **Cenozoic Era:** There is a significant increase in the number of bivalve genera, surpassing brachiopods, especially towards the later part of this era.In summary, the graph displays a transition from brachiopod dominance in the Paleozoic to bivalve dominance in the Cenozoic.

Answered: Interpret the diagram of brachiopod vs.…

Applications and Investigations in Earth Science (9th Edition)

9th Edition

ISBN:9780134746241

Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa

Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa

Chapter1: The Study Of Minerals

Section: Chapter Questions

Problem 1LR

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Interpret the diagram of brachiopod vs. bivalve diversity over time below. Compare their diversity before and after the Paleozoic-Mesozoic boundary. What happened at the Paleozoic-Mesozoic boundary?

**Brachiopod and Bivalve Diversity Over Time**

(Source: Gould and Calloway, 1980)

This graph illustrates the diversity of brachiopod and bivalve genera over three geological eras: Paleozoic, Mesozoic, and Cenozoic. The vertical axis represents the number of genera, ranging from 0 to 700, while the horizontal axis is divided into three time periods.

- **Paleozoic Era:** During this era, the number of brachiopod genera (gray line) is notably higher than that of the bivalve genera (black line).

- **Mesozoic Era:** Both groups show a decline initially, but bivalve genera begin to outnumber brachiopod genera as time progresses.

- **Cenozoic Era:** There is a significant increase in the number of bivalve genera, surpassing brachiopods, especially towards the later part of this era.

In summary, the graph displays a transition from brachiopod dominance in the Paleozoic to bivalve dominance in the Cenozoic.

Expert Solution

Step 1

The graph above shows the diversity of bivalve and brachiopod over the time. It shows how diversities of brachiopod and bivalve changed over the three consecutive periods: Paleozoic, mesozoic, and cenozoic.