TACONIC SYSTEM
\takˈɒnɪk sˈɪstəm], \takˈɒnɪk sˈɪstəm], \t_a_k_ˈɒ_n_ɪ_k s_ˈɪ_s_t_ə_m]\
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In geol. a system of upper Cambrian or lower Silurian rocks lying in the United States to the east of the Hudson, and so named from the Taconic range in the western slope of the Green mountains. The system consists of slates, quartz-rock, and limestone.
By Daniel Lyons