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marinegeo

Òø³æ (ÕýʽдÊÖ)

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QFR R£ºRock fragments
QRL L: aphanitic lithic fragments

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gaoda18

½û³æ (ÕýʽдÊÖ)

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2Â¥2013-07-10 15:33:27
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marinegeo

Òø³æ (ÕýʽдÊÖ)

ÒýÓûØÌû:
2Â¥: Originally posted by gaoda18 at 2013-07-10 15:33:27
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3Â¥2013-07-10 21:13:56
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gaoda18

½û³æ (ÕýʽдÊÖ)

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4Â¥2013-07-10 21:28:52
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marinegeo

Òø³æ (ÕýʽдÊÖ)

ÒýÓûØÌû:
4Â¥: Originally posted by gaoda18 at 2013-07-10 21:28:52
ʲôÒâ˼£¿ÎÒ´ð·ÇËùÁË£¿...

the traditional QFR method, where R stands for¡®rock fragments¡¯, and the ¡®Gazzi-Dickinson¡¯ QFL method where L stands for ¡®aphanitic lithic fragments¡¯. The main difference between these methods is the procedure used for the classification of sand- and gravel-grade rock fragments. The former method records these grains as rock fragments of a particular type (e.g. plutonic), whilst the latter records them as the specific sand- or gravel-grade mineral species (e.g. alkali feldspar)
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5Â¥2013-07-10 22:36:36
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gaoda18

½û³æ (ÕýʽдÊÖ)

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