GTS Present To Past

	A	B	C	D	E	F	G	H	I	J	K	L	M
1	Eon	Era	Period	Subperiod	Epoch	Age	Base	Duration
2	Phanerozoic	Cenozoic	Quaternary		Anthropocene		0.000218	0.000218		2.58		66	541
3					Holocene	Late Holocene	0.0042	0.003982	0.011582
4						Middle Holocene	0.0082	0.004
5						Early Holocene	0.0118	0.0036
6					Pleistocene	Tarantian	0.126	0.1142	2.5682
7						Ionian	0.773	0.647
8						Calabrian	1.8	1.027
9						Gelasian	2.58	0.78
10			Neogene		Pliocene	Piacenzian	3.6	1.012	2.745	20.442
11					Pliocene	Zanclean	5.333	1.733	2.745
12					Miocene	Messinian	7.25	1.917	17.697
13						Tortonian	11.63	4.38
14						Serravallian	13.82	2.19
15						Langhian	15.97	2.15
16						Burdigalian	20.44	4.47
17						Aquitanian	23.03	2.59
18			Paleogene		Oligocene	Chattian	28.1	5.07	10.87	42.97
19					Oligocene	Rupelian	33.9	5.8	10.87
20					Eocene	Priabonian	37.97	4.07	22.1
21						Bartonian	41.03	3.06
22						Lutetian	47.8	6.77
23						Ypresian	56	8.2
24					Paleocene	Thanetian	59.2	3.2	10
25						Selandian	61.6	2.4
26						Danian	66	4.4
27		Mesozoic	Cretaceous		Late	Maastrichtian	72.1	6.1	34.5	79		185.902
28						Campanian	84.19	12.09
29						Santonian	86.49	2.3
30						Coniacian	89.75	3.26
31						Cenomanian	100.5	10.75
32					Early	Albian	113.14	12.64	44.5
33						Aptian	126.3	13.16
34						Barremian	130.8	4.5
35						Hauterivian	134.7	3.9
36						Valanginian	139.4	4.7
37						Berriasian	145	5.6
38			Jurassic		Late	Tithonian	152.1	7.1	18.1	56.36
39						Kimmeridgian	157.3	5.2
40						Oxfordian	163.1	5.8
41					Middle	Callovian	166.1	3	11
42						Bathonian	168.3	2.2
43						Bajocian	170.3	2
44						Aalenian	174.1	3.8
45					Early	Toarcian	183.7	9.6	27.26
46						Pliensbachian	191.36	7.66
47						Sinemurian	199.4	8.04
48						Hettangian	201.36	1.96
49			Triassic		Late	Rhaetian	209.5	8.14	36.64	50.81
50						Norian	228.4	18.9
51						Carnian	237	8.6
52					Middle	Ladinian	241.5	4.5	9.8
53					Middle	Anisian	246.8	5.3	9.8
54					Early	Olenekian	249.8	3	5.102
55					Early	Induan	251.902	2.102	5.102
56		Paleozoic	Permian		Lopingian	Changhsingian	254.15	2.248	6.598	46.998		289.098
57					Lopingian	Wuchiapingian	258.5	3.35	6.598
58					Guadalupian	Capitanian	265.1	6.6	13.8
59						Wordian	268.8	3.7
60						Roadian	272.3	3.5
61					Cisuralian	Kungurian	282	9.7	26.6
62						Artinskian	290.1	8.1
63						Sakmarian	295	4.9
64						Asselian	298.9	3.9
65			Carboniferous	Pennsylvanian	Late	Gzhelian	303.4	4.9	7.8	24.3	60
66	Kasimovian				Late	306.7	3.3		7.8
67	Middle				Moscovian	314.6	7.9	7.9
68	Early				Bashkirian	323.2	8.6	8.6
69	Mississippian			Late	Serpukhovian	330.9	7.7	7.7	35.7
70				Middle	Visean	346.7	15.8	15.8
71				Early	Tournaisian	358.9	12.2	12.2
72	Devonian		Late	Famennian	372.2	13.3	23.8	60.3
73			Late	Frasnian	382.7	10.5	23.8
74			Middle	Givetian	387.7	5	10.6
75			Middle	Eifelian	393.3	5.6	10.6
76			Early	Emsian	407.6	14.3	25.9
77				Pragian	410.8	3.2
78				Lockhovian	419.2	8.4
79	Silurian		Pridoli		423	3.8		24.6
80			Ludlow	Ludfordian	425.6	2.6	4.4
81			Ludlow	Gorstian	427.4	1.8	4.4
82			Wenlock	Homerian	430.5	3.1	6
83			Wenlock	Sheinwoodian	433.4	2.9	6
84			Llandovery	Telychian	438.5	5.1	10.4
85				Aeronian	440.8	2.3
86				Rhuddanian	443.8	3
87	Ordovician		Late	Hirnantian	445.2	1.4	14.6	41.6
88				Katian	453	7.8
89				Sandbian	458.4	5.4
90			Middle	Darriwillian	467.3	8.9	11.6
91			Middle	Dapingian	470	2.7	11.6
92			Early	Floian	477.7	7.7	15.4
93			Early	Tremadocian	485.4	7.7	15.4
94	Cambrian		Furongian	Age 10	489.5	4.1	11.6	55.6
95				Jiangshanian	494	4.5
96				Paibian	497	3
97			Miaolingian	Guzhangian	500.5	3.5	12
98				Drumian	504.5	4
99				Wuliuan	509	4.5
100			Epoch 2	Age 4	514	5	11