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Preliminary Analysis Of Cores From North San Francisco Bay, California

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GC-4A Analyses


Field Descriptions of GC-4A
Core ID Length (m) Latitude Longitude Setting Description
GC4A 2.96 38� 12' 57.551 122� 23' 36.074 Middle Shoal Over-penetration; gray-green mud plus shells on outside of barrel;  CC sample, very cohesive mud, CC was pushed up so lowest few cm are partly below CC; Bottom section: homogenous gray mud; Top section: small broken shell pieces, homogenous sample.

X-radiograph (0-320 cm)

Click on the above link to view X-ray scans for GC-4A.


Magnetic Susceptibility and X-ray Descriptions

Combined graph showing higher magnetic values (about 50) in the upper 90 cm and lower 90 cm.  The middle 100 cm of core shows approximate values of 20-30.

Click image for a larger version (73 kb JPEG)

 

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http://geopubs.wr.usgs.gov/open-file/of03-111/Analyses/GC4A/GC4A.html
maintained by Carolyn Donlin
last modified 19 February 2003 (lzt)