Table 1.

Sample site coordinates, brief site description, and mineral phases identified (wt%) at each site.

Sample Site	Coordinates	Site Description	Mineral Phases (wt%)
1	39.950459, −75.148089	Side road - near Liberty Park	Quartz (80%), Dolomite (6%), Albite (11%), Almandine (3%)
2	39.948087, −75.154043	Commercial road	Quartz (73%), Dolomite (9%), Anorthite (13%), Calcite (5%)
3	39.953268, −75.156346	Commercial road	Quartz (66%), Dolomite (5%), Calcite (1%), Labradorite (24%), Phlogopite (4%)
4	39.952216, −75.199178	University/city road	Quartz (76%), Dolomite (4%), Albite (12%), Halloysite (8%)
5	39.951284, −75.190590	University road	Quartz (61%), Dolomite (1%), Andesine (17%), Diopside (21%)
6	39.957017, −75.181871	Near main transport station - off highway	Quartz (80%), Dolomite (7%), Anorthite (13%)
7	39.960278, −75.197171	Commercial road	Quartz (76%), Dolomite (7%), Anorthite (11%), Calcite (1%), Phlogopite (5%)
8	39.949890, −75.204166	Road near trolley portal	Quartz (87%), Dolomite (2%), Anorthite (9%), Halloysite (2%)
9	39.949548, −75.203931	Trolley portal	Quartz (98%), Annite (2%)
10	39.948661, −75.170994	Residential - near Rittenhouse apartments	Quartz (84%), Dolomite (3%), Anorthite (13%)
11	39.951630, −75.164241	Near City hall	Quartz (80%), Dolomite (2%), Anorthite (18%)
12	39.954645, −75.165146	Central Philadelphia road	Quartz (71%), Dolomite (4%), Albite (7%), Biotite (18%)
13	39.962053, −75.161513	Commercial road	Quartz (78%), Dolomite (5%), Anorthite (13%), Magnetite (4%)
14	39.965588, −75.179119	Near art museum - Fairmount Park	Quartz (71%), Dolomite (9%), Anorthite (18%), Hematite (2%), Muscovite (<1%)
15	39.966483, −75.181890	Behind art museum - Fairmount Park	Quartz (75%), Dolomite (7%), Anorthite (17%), Halloysite (1%)
16	39.984811, −75.085894	Industrial road - Port Richmond	Quartz (88%), Anorthite (11%), Halloysite (1%)
17	39.978746, −75.097185	Industrial road - Port Richmond	Quartz (56%), Dolomite (4%), Andesine (17%), Diopside (23%)
18	39.988749, −75.203374	Fairmount Park - along Schuylkill River	Quartz (77%), Dolomite (8%), Anorthite (14%), Hematite (1%)
19	39.985714, −75.210803	Fairmount Park - inside park	Quartz (70%), Dolomite (8%), Anorthite (22%), Illite (<1%)
20	39.989330, −75.218534	Fairmount Park - inside park	Quartz (66%), Dolomite (21%), Albite (10%), Calcite (1%), Hematite (2%)
21	39.951538, −75.181789	Walnut Street Bridge	Quartz (69%), Dolomite (9%), Albite (11%), Augite (8%), Hematite (3%)
22	39.914883, −75.156579	South Philadelphia	Quartz (58%), Dolomite (7%), Anorthite (14%), Andesine (21%)
23	39.921158, −75.144703	South Philadelphia business	Quartz (70%), Dolomite (7%), Anorthite (23%), lllite (<1%)
24	39.941356, −75.154234	Residential road	Quartz (84%), Dolomite (5%), Anorthite (11%)
25	39.940093, −75.166221	Commercial road	Quartz (83%), Dolomite (5%), Anorthite (12%)
26	39.877175, −75.213773	Industrial road	Quartz (80%), Dolomite (8%), Albite (12%), lllite (<1%)
27	39.918472, −75.209211	Industrial road	Quartz (81%), Dolomite (5%), Anorthite (14%)
28	39.936328, −75.213334	Industrial road	Quartz (51%), Dolomite (3%), Anorthite (10%), Actinolite (3%), Biotite (14%), Diopside (19%)
29	39.979679, −75.157660	High traffic road (northbound) - near University	Quartz (81%), Dolomite (4%), Anorthite (15%)
30	39.979679, −75.157660	High traffic road (southbound) - near University	Quartz (78%), Dolomite (3%), Anorthite (9%), Illite-Montmorillonite (10%)
Asphalt	39.949890, −75.204166	Road itself sampled	Quartz (7%). Dolomite (23%). Albite (70%)