« previous next »

Author Question: Which type of ore deposit originated before there was free oxygen in the atmosphere? a. banded iron ... (Read 82 times)

ishan

  • Hero Member
  • *****
  • Posts: 546
on: Jul 15, 2018

Which type of ore deposit originated before there was free oxygen in the atmosphere?
  a. banded iron formation
  b. manganese nodules
  c. colcanogenic copper
  d. gold placer deposits
  e. bauxite



Question 2

What kind of process produces banded iron formations?
  a. sedimentary
  b. hydrothermal
  c. igneous
  d. weathering
  e. metamorphic



Laurenleakan

  • Sr. Member
  • ****
  • Posts: 309
Reply #1 on: Jul 15, 2018
Answer to Question 1

A

Answer to Question 2

A


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

There used to be a metric calendar, as well as metric clocks. The metric calendar, or "French Republican Calendar" divided the year into 12 months, but each month was divided into three 10-day weeks. Each day had 10 decimal hours. Each hour had 100 decimal minutes. Due to lack of popularity, the metric clocks and calendars were ended in 1795, three years after they had been first marketed.

Did you know?

Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.

Did you know?

The Food and Drug Administration has approved Risperdal, an adult antipsychotic drug, for the symptomatic treatment of irritability in children and adolescents with autism. The approval is the first for the use of a drug to treat behaviors associated with autism in children. These behaviors are included under the general heading of irritability and include aggression, deliberate self-injury, and temper tantrums.

Did you know?

Acetaminophen (Tylenol) in overdose can seriously damage the liver. It should never be taken by people who use alcohol heavily; it can result in severe liver damage and even a condition requiring a liver transplant.

Did you know?

Hyperthyroidism leads to an increased rate of metabolism and affects about 1% of women but only 0.1% of men. For most people, this increased metabolic rate causes the thyroid gland to become enlarged (known as a goiter).

Elastic fibres are made of elastin, one type of structural protein found in the ECM of animal cells Elastic fibres are made of elastin, one type of structural protein found in the ECM of animal cells
Mechanisms of water movement from soil through plants to the atmosphere. Mechanisms of water movement from soil through plants to the atmosphere.
Sources of SO2 Pollution in the Atmosphere Sources of SO2 Pollution in the Atmosphere
Connections of a nitric acid plant, intermediate pressure type Connections of a nitric acid plant, intermediate pressure type
Foods made with fat substitutes aren’t calorie free Foods made with fat substitutes aren’t calorie free
Hyperbaric Oxygen Chamber Used in the Treatment of Decompression Illness Hyperbaric Oxygen Chamber Used in the Treatment of Decompression Illness
Video: HIV replication/ Replication cycle of HIV

For a complete list of videos, visit our video library