Bonus

Many routes within this place were developed by the enslaved men Mat and Nick Bransford, whose descendants still guide visitors in it. For 10 points each:
[10m] The Echo River and Bottomless Pit are in what natural location that extends for over 400 miles? Enslaved man Stephen Bishop drew an early map of this location, where some visitors take the Violet City Lantern Tour.
ANSWER: Mammoth Cave, Kentucky [accept Mammoth Cave National Park]
[10e] Enslaved African Americans in Mammoth Cave mined this mineral, which derives from bat guano and is used to make gunpowder.
ANSWER: saltpeter [or potassium nitrate; or niter; accept calcium nitrate since that was the material most commonly excavated in Mammoth Cave and turned into potassium nitrate by later chemical processes]
[10h] Enslaved men also worked in Kentucky’s Great Saltpetre Cave, which consists mainly of this type of cave passage. In contrast to fully submerged phreatic passages, water can flow freely along the floor of these areas.
ANSWER: vadose cave passages [or vadose zones]
<Geography>
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Conversion

TeamOpponentPart 1Part 2Part 3TotalParts
Arizona StateLSE010010E
Chicago BToronto B1010020ME
Iowa StateToronto C1010020ME
MITJohns Hopkins1010020ME
MichiganMaryland1010020ME
MinnesotaCornell A010010E
North Carolina AToronto A010010E
NorthwesternUC Berkeley A1010020ME
Ohio StateIllinois B100010M
OttawaWUSTL B1010020ME
Penn StateBritish Columbia1010020ME
RITCornell B010010E
RutgersColumbia A1010020ME
StanfordIndiana010010E
TexasVirginia Tech010010E
UC Berkeley BFlorida010010E
UCFColumbia B1010020ME
VanderbiltNorth Carolina B1010020ME
VirginiaWinona State010010E
WUSTL AIllinois A010010E
Waterloo AChicago A1010020ME
Waterloo BGeorgia State1010020ME
YaleNYU0000

Summary

TournamentExact Match?HeardPPBEasy %Medium %Hard %
2025 ACF NationalsYes2314.7891%57%0%