A. Olivine
B. Amphibole
C. Pyroxene
D. Biotite
Choose the correct answer from the options given below:
Understanding Mineral Crystallization Sequence
This question asks to identify the correct order in which minerals crystallize from magma as it cools, based on fractional crystallization. This process follows Bowen's Reaction Series.
Bowen's Reaction Series and Mineral Order
Bowen's Reaction Series describes the sequence of mineral formation as magma cools. Minerals that crystallize at higher temperatures tend to form first, followed by minerals that crystallize at lower temperatures.
The minerals given are:
- A: Olivine - Crystallizes at the highest temperatures (early stage).
- C: Pyroxene - Crystallizes after olivine but before amphibole.
- B: Amphibole - Crystallizes after pyroxene.
- D: Biotite - Crystallizes at lower temperatures (late stage).
Correct Mineralisation Sequence
Following Bowen's Reaction Series from high temperature to low temperature, the sequence is:
- Olivine (A)
- Pyroxene (C)
- Amphibole (B)
- Biotite (D)
Therefore, the correct sequence is A, C, B, D.
Important Questions from Forecasting
The correlation coefficient between two variables X and Y is found to be 0.6. All the observations on X and Y are transformed using the transformations U = 2 – 3X and V = 4Y + 1. The correlation coefficient between the transformed variables U and V will be
Which of the following lines is known as the trend line?
An XYZ television supplier found a demand of 200 sets in July, 225 sets in August and 245 sets in September. Find the demand forecast for the month for the month of October using simple average method.
Name the human resource demand (need) forecasting technique, which solicits estimates of personnel needs from a group of experts, usually managers. The HRP experts act as intermediaries, summarise the various responses and report the findings back to the experts. The experts are surveyed again after they receive this feedback. Summaries and surveys are repeated until the experts' opinions begin to agree. The agreement reached is the forecast of the personnel needs.
Select the correct option :
Which of the following is a technique used for forecasting?
