Thanks for the follow up info on your finds.
I've never detected in NV, even though I've been in Las Vegas every January for for the past 20 years working a trade show.
I know your state has had a long and varied history.
"The Nevada 1861 territory boundary (in blue) has changed three times. In 1864 statehood shifted eastern border from 39th to 38th meridian, 1866 May 5; east border (in pink) moved eastward 53.3 mi, from 38th to 37th meridian, and 1867 January 18; south boundary (in yellow) moved from the 37th parallel north southward to the current boundary."