tab delimited	contribution
id	version	timestamp	contributor	data_model_version	reference	description
15280	2	2006-12-20T09:42:41.000Z	@magic	3.0	10.1139/e87-225	Upgraded to MagIC Data Model 3.0 by the MagIC Database Team
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tab delimited	locations
location	location_type	result_name	result_type	method_codes	citations	geologic_classes	lithologies	geological_province_sections	lat_s	lat_n	lon_w	lon_e	continent_ocean	country	region	age_low	age_high	age_unit	dir_tilt_correction	dir_dec	dir_inc	dir_alpha95	dir_k	dir_n_sites	dir_n_samples	fold_test	conglomerate_test	contact_test	reversal_test	pole_lat	pole_lon	pole_dp	pole_dm	pole_comp_name	pole_reversed_perc	description	rock_magnetic_test
Portage Lake Volcanics, Hematite	Outcrop	5902	i	 DE-DI : LT-T-Z:LP-DC3 	This study	Extrusive	Extrusives	Portage Lake Volcanics	47.1	47.1	271.7	271.7	North America	U.S.A.	Michigan	1094	1098	Ma	100	291.3	37	6.9	180	4	28	ND	ND	ND	ND	29.3	181.1	4.7	8.1	Hematite	0	Age >1054+/-34 <1098+/-4. Copper Mineralization 1060+/-20 Ma. Hematite Comp. . Thermal to 690C, component in range 585-690C.	ND
Portage Lake Volcanics, Magnetite	Outcrop	5901	i	 DE-DI : LT-T-Z:LP-DC3 	This study	Extrusive	Extrusives	Portage Lake Volcanics	47.1	47.1	271.7	271.7	North America	U.S.A.	Michigan	1094	1098	Ma	100	291.4	25.9	13.2	50	4	27	ND	ND	ND	ND	24.4	175.5	7.6	14.2	Magnetite	0	Age >1054+/-34 <1098+/-4. Copper Mineralization 1060+/-20 Ma. Magnetite Comp. . Thermal to 690C, component in range 200-550C. Samples from centres of less altered flows.	ND
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tab delimited	ages
location	age_low	age_high	age_unit	timescale_eon	timescale_era	timescale_period	description	method_codes	timescale_citations	citations
Portage Lake Volcanics, Hematite	1094	1098	Ma	Proterozoic	Mesoproterozoic	Stenian	U-Pb age 1096+/-2 Ma.	GM-UPB	Gradstein et al. 2004	This study
Portage Lake Volcanics, Magnetite	1094	1098	Ma	Proterozoic	Mesoproterozoic	Stenian	U-Pb age 1096+/-2 Ma.	GM-UPB	Gradstein et al. 2004	This study