Tempo Geológico - exercícios
Curso de Geologia Geral - Miguel Tupinambá /2003
 


 Exercício 1
Datação relativa (Pamela J. W. Gore)

Leia aqui a base teórica para os exercícios de Mrs. Gore (opcional)

Fácil !!!


Exercício 2
Pacote de exercícios da ATHRO (em inglês): Falha; Dobras e Intrusão; Duas intrusões; uma seção real.

Médio !!!


Exercício 3
Descreva toda a sequência de eventos geológicos no Grand Canyon
dica: demora a carregar!

Um pouco mais difícil!!!


Consulte o seu livro e preencha a tabela do Tempo Geológico - utilize este exercício quantas vezes fôr necessário até apreender a ordem dos períodos e eras.

Não consulte as respostas do exercício !


James Hutton

Scottish - Changed careers three times and didn't publish until he was 62. Lived from 1726-1797: during a time when natural phenomena were being explained by natural causes. Observed unconformities, and believed in cycles.Proposed the Rock Cycle
EXPLAINED EARTH'S NATURAL PHENOMENA BY NATURAL CAUSES WHICH HE COULD SEE OPERATING TODAY. Led to what we call: THE PRINCIPLE OF UNIFORMITARIANISM - REVELED IN THE CONCEPT OF DEEP TIME.  He viewed the Earth and Earth history as having, "no vestige of a beginning, no prospect of an end."

Faça aqui uma excursão virtual ao Siccar Point, local onde Hutton observou a sensacional discordância e o fêz pensar na Máquina Viva da Terra! Dica: clique no Siccar point e vá clicando em "closer".


STENO'S PRINCIPLES OF STRATIGRAPHY
Nicolaus Steno: 1638-1686
The prodromus of Nicolaus Steno's dissertation concerning a solid body enclosed by a process of nature within a solid"

 

Consulte a fonte deste Bloco de informações sobre os princípios de Steno

THE PRINCIPLE OF SUPERPOSITION

* In a sequence of strata, any stratum is younger than the sequence of strata on which it rests, and is older than the strata that rest upon it.

"...at the time when any given stratum was being formed, all the matter resting upon it was fluid, and, therefore, at the time when the lower stratum was being formed, none of the upper strata existed." Steno, 1669.

PRINCIPLE OF INITIAL HORIZONTALITY

* Strata are deposited horizontally and then deformed to various attitudes later.
"Strata either perpendicular to the horizon or inclined to the horizon were at one time parallel to the
horizon." Steno, 1669.

PRINCIPLE OF STRATA CONTINUITY

* Strata can be assumed to have continued laterally far from where they presently end.
"Material forming any stratum were continuous over the surface of the Earth unless some other solid bodies stood in the way." Steno, 1669

PRINCIPLE OF CROSS CUTTING RELATIONSHIPS

* Things that cross-cut layers probably postdate them.
"If a body or discontinuity cuts across a stratum, it must have formed after that stratum." Steno, 1669