Mengukur Dip & strike menggunakan Kompas Geologi

Summary

In this instructional video, the presenter explains how to measure and determine the strike and dip of a rock exposure using a Brunton compass. The process involves aligning the compass with the rock formation to accurately determine the strike, followed by the careful adjustment of the instrument to measure the dip. Key tips are shared, such as ensuring the compass is positioned correctly for precision. The video wraps up with a reminder of the simplicity of these techniques, emphasizing their importance in geological fieldwork, while ending with a respectful greeting.

Takeaways

• 😀 The speaker begins by greeting the audience with 'Assalamualaikum warahmatullahi wabarakatuh' and introduces the topic of measuring strike and dip using a Brunton compass.
• 😀 The purpose of the video is to explain how to determine the strike and dip of a geological outcrop.
• 😀 The first step is to position the Brunton compass properly on the outcrop to measure the strike accurately.
• 😀 The speaker emphasizes that the compass should be placed flat and aligned with the plane of the outcrop.
• 😀 The strike is determined by aligning the compass with the bedding plane and reading the bearing of the strike line.
• 😀 The compass needle should be centered, ensuring that the reading is accurate and not skewed.
• 😀 The strike in the example is found to be 331.5 degrees, which is noted as an important measurement.
• 😀 After determining the strike, the speaker explains the process of measuring the dip, which refers to the angle of the plane relative to the horizontal.
• 😀 To measure the dip, the compass should be positioned so that it shows the correct orientation of the plane's angle.
• 😀 The dip value is read from the scale, with the example showing a dip of 5 degrees.
• 😀 The speaker concludes by summarizing the simple steps of determining strike and dip using the Brunton compass and offers a final greeting.

Q & A

What is the main focus of the video?

The video focuses on explaining how to measure and determine the strike and dip of a geological outcrop using a Brunton compass.

How does the presenter start the process of determining strike and dip?

The presenter begins by discussing how to position the Brunton compass on a rock outcrop in order to determine the strike direction.

What is the importance of the Brunton compass in this process?

The Brunton compass is essential because it allows precise measurement of the strike and dip of geological features, which are crucial for understanding the orientation of rock layers.

What is the first step in determining the strike of a rock layer?

The first step is to place the Brunton compass on the surface of the rock layer and align it to measure the strike direction.

How is the strike direction measured using the Brunton compass?

The strike direction is measured by adjusting the compass to ensure that the needle is aligned properly, and the reading of the strike angle is noted, in this case, 331.5 degrees.

What should be ensured when positioning the Brunton compass for measuring the strike?

It is crucial to ensure that the compass is positioned flat on the rock surface and aligned properly with the geological feature to get an accurate strike measurement.

How is the dip determined using the Brunton compass?

To determine the dip, the presenter mentions that the compass should be positioned with the needle pointing in the appropriate direction, and the dip is then measured using the scale on the compass, with the reading found between two lines (e.g., 5° in this case).

What is the significance of the dip measurement in geological surveys?

The dip measurement helps in determining the angle at which a rock layer is inclined relative to the horizontal plane, which is crucial for understanding the geological structure.

How does the presenter ensure that the measurements are accurate?

The presenter ensures accuracy by making sure the compass is properly aligned and adjusted for both strike and dip measurements, checking for precision in readings.

What does the presenter emphasize at the end of the video?

At the end of the video, the presenter emphasizes that the process of determining strike and dip using the Brunton compass is simple once the correct technique and positioning are understood, and concludes with a polite apology for any shortcomings.