Leg : 18 Top/Bottom Interval(mm): 100/ 0 Describer: MacLeod, N.S. Hole: 177A Top of Core Depth(m) : 378.50 Rock Type: IGNEOUS Core: 24 Sample Midpoint(m) : 378.60 Sect/Pc #: 1/ ROCK = BASALT SOURCE IS IR* Groundmass - PLAGIOCLASE ( 40%) OLIVINE ( 10%) ENTIRELY REPLACED BY CLAY MINERALS,PROPORTION SHOWN IS APPROXIMATE; SPINEL ( .25%) PYROXENE ( 35%) MATRIX ( 14.5%) SAME AS 177A-25-116,PERCENTAGES OBTAINED BY MODAL ANALYSES* Vesicles - Percent: .25 AMYGDULES* Leg : 18 Top/Bottom Interval(mm): 1140/ 0 Describer: MacLeod, N.S. Hole: 177A Top of Core Depth(m) : 378.50 Rock Type: IGNEOUS Core: 24 Sample Midpoint(m) : 381.14 Sect/Pc #: 2/ ROCK = BASALT SOURCE IS IR,UNCERTAIN ABOUT SECTION NUMBER* Groundmass - PLAGIOCLASE ( 46.5%) OLIVINE ( 8.5%) ENTIRELY REPLACED BY CLAY MINERALS,PROPORTION SHOWN IS APPROXIMATE; SPINEL ( .25%) PYROXENE ( 29.5%) MATRIX (15.25%) SAME AS 177A-25-116,PERCENTAGES OBTAINED BY MODAL ANALYSES* Leg : 18 Top/Bottom Interval(mm): 1400/ 0 Describer: MacLeod, N.S. Hole: 177A Top of Core Depth(m) : 378.50 Rock Type: IGNEOUS Core: 24 Sample Midpoint(m) : 381.40 Sect/Pc #: 2/ ROCK = BASALT SOURCE IS IR,UNCERTAIN ABOUT SECTION NUMBER* Groundmass - PLAGIOCLASE ( 43%) OLIVINE ( 8%) ENTIRELY REPLACED BY CLAY MINERALS,PROPORTION SHOWN IS APPROXIMATE,PERCENTAGES OBTAINED BY MODAL ANALYSES* Vesicles - Percent: .25 AMYGDULES* Leg : 18 Top/Bottom Interval(mm): 1160/ 0 Describer: MacLeod, N.S. Hole: 177A Top of Core Depth(m) : 381.50 Rock Type: IGNEOUS Core: 25 Sample Midpoint(m) : 384.16 Sect/Pc #: 2/ ROCK = DIABASE SOURCE IS IR* Groundmass - PLAGIOCLASE ( 19.5%) OLIVINE ( 7.5%) ENTIRELY REPLACED BY CLAY MINERALS,PROPORTION SHOWN IS APPROXIMATE; SPINEL ( .25%) MATRIX ( 72%) VERY FINE GRAINED OPAQUE MINERALS,PYROXENE AND CLAY MINERALS(AFTER GLASS?),PERCENTAGES OBTAINED BY MODAL ANALYSES* Vesicles - Percent: .25 AMYGDULES* |
Cite as: Deep Sea Drilling Project (1989): Archive of Core and Site/Hole Data and Photographs from the Deep Sea Drilling Project (DSDP). National Geophysical Data Center, NOAA. doi:10.7289/V54M92G2 [access date]
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