TABLE 5.

Comparison geochemistry of SHF and terrestrial hot spring sites.

	Geographic location	pH	Temp °(C)
Strýtan HF1,2	Iceland	10.2	70
Icelandic hot springs3	Iceland	9–10	70–90
Lower geyser basin4,5,6,7	Yellowstone NP, United States	8–9.5	70–90
Teppanom hot spring8	Thailand	9	89
Lobios hot spring9	Spain	8.2	76
Ambitle Island10	Papua New Guinea	8.5	93.5
Nakabusa hot springs11,12	Japan	8.9	72–80

¹This Study. ²Price et al. (2017). ³Tobler and Benning (2011). ⁴Reysenbach et al. (1994). ⁵Blank et al. (2002). ⁶Boomer et al. (2009). ⁷Meyer-Dombard et al. (2011). ⁸Purcell et al. (2007). ⁹López-López et al. (2015). ¹⁰Meyer-Dombard and Amend (2014). ¹¹Nakagawa and Fukui (2003). ¹²Nishihara et al. (2018).