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TABLE 2-1 <br /> ,r ITASCA <br /> Rock-Type Groups and Relative Abundance Denver,Inc. <br /> Percent of <br /> Group Includes Count <br /> Total Count <br /> Cripple Creek breccia, Ash breccia, Crystal-lithic breccia, <br /> Late-stage matrix-supported breccia, Late-stage clast- <br /> Breccia 5,933 57.8% <br /> supported breccia, Mineralized matrix eighty-six, Micro- <br /> breccia <br /> Biotite porphyritic phonolite, Hornblende porphyritic <br /> phonolite, Porphyritic phonolite with K-spar, Porphyritic <br /> Porphyritic phonolite phonolite-matrix breccia, Mega-crystic phonolite, Mafic 3,324 32.4% <br /> porphyritic phonolite, Undifferentiated porphyritic <br /> phonolite <br /> Undifferentiated aphanitic phonolite,Aphanitic phonolite- <br /> Aphanitic phonolite matrix breccia, Aphanitic phonolite dike,Vesicular 505 4.9% <br /> aphanitic phonolite <br /> Syenite, Biotite gneiss, Biotite schist, Precambrian <br /> Other Intrusive 292 2.8% <br /> granodiorite, Precambrian coarse leucogranite pegmatite <br /> Biotite lamprophyre, Lamprophyre-matrix breccia, <br /> La m prophyre 164 1.6% <br /> Hornblende lamprophyre, Undifferentiated lamprophyre <br /> Milky Qz vein,Quartz-fluorite vein, Smoky Qz vein, <br /> Undifferentiated vein <br /> Vein/Other 54 0.5% <br /> Bedded ash tuff,Vitric glass tuff,Trachydolerate, Pre- <br /> Cambrian aplite, Precambrian breccia <br /> Total 10,272 100% <br /> Note: <br /> In some cases more than one geologic code was assigned to a single LECO'"'-data interval. In these cases,the <br /> geologic intervals were used for estimating relative abundance tabulated here; however, those intervals were <br /> excluded from the LECOT"' evaluation due to ambiguity regarding the corresponding geology.As a result, <br /> there are some minor differences in the numbers of samples presented in Table 2-1 and those tabulated in <br /> Figure 2-2. <br />