Bayan ya yi aiki na 'yan shekaru a Wyoming don AMNH a ƙarshen shekarun 1890, Brown ya jagoranci wani bincike zuwa Hell Creek Formation na Kudu maso gabashin Montana. A can, a 1902, ya gano kuma ya haƙa da farko da aka rubuta ragowar Tyrannosaurus rex. The Hell Creek digs samar da yawa na burbushin halittu, isa ya cika dukan jirgin kasa cars. Kamar yadda aka saba yi to, Brown ta crews amfani sarrafawa fashewa na dynamite cire ton na dutse rufe su burbushin halittu discoveries. Duk abin da aka koma da doki-ja da karusai da kuma tsarki manpower. Ba safai aka yi rikodin wani site data. Tambaya: Ina Brown tafi bayan Wyoming?
Kudu maso gabashin Montana