Study Notes for ES 2240F/G: Catastrophic Events Earth Sciences

Key Topics Glossary for ES 2240F/G: Catastrophic Events Earth Sciences

Chapter 1: Philosophy in Geology

• In this chapter, we learn about:

  • Geology and Religion

  • Catastrophism

  • Uniformitarianism

Geology and Religion

• Early Principles of Geology:

  • Many early geological principles faced substantial rejection, primarily due to conflicts with religious dogma, notably from the Catholic Church in Europe.

  • Geological findings contributed significantly to Charles Darwin's formulation of the principle of Evolution, for which he was met with severe backlash.

  • Nicolaus Steno: Recognized as the father of stratigraphy; he controversially renounced his scientific work after persuasion to align with the Catholic Church.

  • The combination of religion and politics significantly delayed scientific progress, as findings contradicting the Church were often ridiculed and denounced.

Figures

• James Hutton: Portrait painted by Henry Raeburn (1776), exhibited at the Scottish National Gallery.

Historical Influence of Religion on Geology

• Thomas Burnet:

  • A clergyman who posited that Earth's uneven features (valleys, mountains, ridges) were the result of Noah’s Flood, as narrated in the Bible.

  • Alongside Steno, their geological findings attracted considerable attention, but Steno’s evidence was overlooked in favor of Burnet’s due to language differences (Burnet wrote in English).

• Archbishop James Ussher:

  • Mathematically determined the Earth's age backward through the Bible, concluding the Earth was created on the evening of October 22, 4004 B.C., making it roughly 5654 years old at the time of his calculations.

  • Ussher’s work was not factually incorrect based on the Biblical timeline and went on to influence pseudo-scientific views into the 1800s.

Figures

• Archbishop James Ussher: Portrayed by Sir P. Lely (c.1654).

Catastrophism

• Evolving from Burnet's theories, Catastrophism became the dominant geological doctrine from the late 1700s to early 1800s.

• Baron Georges Cuvier:

  • A notable French nobleman and scientist who spearheaded the Catastrophism doctrine.

  • Authored a scholarly paper on the stratigraphy within the Paris Basin, noting peculiar repeated layers of sediments.

  • Proposed that these unusual layers were a result of massive, sudden catastrophic floods.

  • Utilized the account of Noah’s Flood and analogous narratives from various cultures to construct a historic timeline of catastrophic events on Earth.

Figures

• Baron Georges Cuvier: Significant figure in the advancement of Catastrophism; engraved portrait by James Thomson.

Core Beliefs of Catastrophism

• Key tenets of Catastrophism included:

  • The Earth’s geological record consists of unique catastrophic events.

  • Rejection of evolution in all forms (biological, geological, etc.).

  • The belief that nature could not be predicted.

  • These beliefs hindered scientific advancement.

  • Baron Cuvier amassed a substantial fossil collection, playing a crucial role in understanding extinct species despite denying evolutionary theory due to religious faith.

Figures

• Cuvier's sketch of a Mastodon, comparing it to an Elephant, demonstrating the conflict between scientific findings and religious beliefs.

Catastrophism: The Believer’s Perspective

• If one accepted Catastrophism, one might assert:

  • The Earth began its existence as a molten entity.

  • Upon cooling, unpredictable global convulsions shaped its topography, including mountain formations rich with fossils.

  • All valleys were formed as a result of a simultaneous, global feature erosion influenced by the Biblical Noah’s Flood.

  • Fossils represented species that no longer existed, obliterated by successive catastrophes.

  • There was no continuity or evolutionary connection between species over time, as each was considered a unique creation from a specifically Christian God.

Figures

• Mastodon and Elephant jawbone sketches demonstrating Cuvier's findings on extinct species.

Uniformitarianism

• Originally termed Gradualism, Uniformitarianism was first articulated by James Hutton in 1795 in his book Theory of Geology; he passed away two years later.

• Hutton, acknowledged as the Father of Modern Geology, initially faced rejection due to his less articulate presentation compared to Cuvier.

• Through meticulous observation of creeks and sediment movement, Hutton concluded that landforms evolve gradually over time rather than through sudden events.

Figures

• Portrait of James Hutton, an observant medical doctor turned geologist, painted by H.Raeburn (1776).

Charles Lyell and Uniformitarianism

• Charles Lyell:

  • A compelling advocate for Uniformitarianism, drawing from Hutton's foundational work in his influential book Principles of Geology (1830).

  • He dismissed Bishop Ussher’s geological timeline, promoting unlimited geological time and vocally opposing those who disagreed with him.

  • With Cuvier's death in 1832, Lyell’s arguments for Uniformitarianism gained traction and led to significant geological and biological advancements.

Figures

• Portrait of Charles Lyell, a pivotal figure in the evolution of geological thought, painted by G.J.Stodart.

The Law of Uniformitarianism

• The essential premise of Uniformitarianism can be summarized as follows:

  • The geological processes observed today have always occurred in the same manner and at the same rates throughout Earth's history.

• Uniformitarianism remained the prevailing theory until the advent of Plate Tectonics; however, some took the concept to extremes.

• Notably, Uniformitarianism struggled to explain certain geological formations, exemplified by the Berringer Crater in Arizona, which was initially disregarded by the geological community until its significance was recognized in 1960.

Figures

• The Berringer Crater in the Mojave Desert, a significant geological landmark initially overlooked by the USGS (government staff).