Table 4. List of core samples from Hole 997A selected for X-ray diffraction analysis. Relative amount of illite and smectite in the mixed-layer clays from Hole 997A core samples are also listed.

Core sample depth (mbsf)	Illite (vol%)	Smectite (vol%)
203	45	55
205	50	50
208	55	45
210	55	45
354	55	45
366	50	50
370	45	55
424	50	50
425	55	45
427	50	50
443	50	50
448	50	50
450	50	50
472	50	50
475	55	45
482	50	50
570	55	45
573	55	45
579	45	55
582	50	50
589	55	45