POLLEN ANALYSIS OF STRATIGRAPHIC DEPOSITS AT THE MILL IRON SITE, SOUTHEASTERN MONTANA

The Mill Iron Site is located near the top of a south and west sloping remnant in a grassland-badland terrain. The vegetation on top of the remnant is presently dominated by sedges (Cyperaceae) and grasses (Gramineae), although sagebrush is also noted. The west slope of the remnant supports more shrubby plants, including rabbitbrush (Chrysothamnus-a High-spine Compositae), greasewood (Sarcobatus), and sagebrush (Artemisia). TIle south side of the cuesta is dominated by saltbrush (Atriplex--a Cheno-am), although it also supports grasses (Gramineae), greasewood (Sarcobatus), rabbitbrush (Chrysothamnus--a High-spine Compositae), and sagebrush (Artemisia).米尔艾恩遗址（Mill Iron Site）坐落于一处兼具南向与西向坡度的残丘顶部附近，所处地貌为草原-劣地（grassland-badland）复合地貌。目前该残丘顶部的植被以莎草科（Cyperaceae）植物与禾本科（Gramineae）草本占绝对优势，同时亦有山艾树（sagebrush）分布。残丘的西坡生长有更多灌木类植物，包括兔枝黄菊（Chrysothamnus，高刺菊科（Compositae））、肉叶刺茎藜（greasewood，Sarcobatus）以及山艾树（sagebrush，Artemisia）。该单面山（cuesta）的南侧以滨藜属植物（saltbrush，Atriplex——藜科（Cheno-am））为优势类群，同时亦伴生有禾本科（Gramineae）草本、肉叶刺茎藜（Sarcobatus）、兔枝黄菊（Chrysothamnus，高刺菊科（Compositae））以及山艾树（Artemisia）。