Oregon!
RyansRocks
- 93 / 175
1
Thunderegg Inspection!
0:28
2
Plume botryoidal chalcedony nugget!
3:03
3
Plume slice!
2:03
4
Botryoidal slice!
2:03
5
Plume agate inspection!
4:32
6
Plume flow!
2:13
7
Botryoidal Chalcedony Nugget!
1:51
8
Playing with color!
0:50
9
Plume chunk glow!
1:13
10
Red dot glow slice!
0:49
11
Glow plume!
1:07
12
Carnelean Glow!
0:52
13
Jasper glow!
1:05
14
Glow Plume!
0:51
15
Plume chunk glow!
0:52
16
Slab o' Plume Glow!
1:03
17
Glow chunk!
0:52
18
Plume agate glow!
0:54
19
The green caught my eye!
0:33
20
Square geode!
0:33
21
Big ol' chunk!
0:41
22
Beautiful dark opal!
0:31
23
Hot Botryoidal Mess!
0:51
24
Plume agate!
0:37
25
A Bit o' Honey Plume Agate!
0:35
26
Brecciated jasper!
0:33
27
Plume agate!
0:51
28
Alien egg!
0:40
29
Half of a geode!
0:36
30
It's curved!
0:39
31
Plume Agate!
0:36
32
Botryoidal formations!
0:32
33
Carnelian sandwich!
0:30
34
Broken geode!
0:33
35
This half survived Monther Nature!
0:30
36
Plume agate!
0:54
37
Beautiful Colors!
0:40
38
Jasper, Chalcedony, Opal & ???
0:52
39
Cool Banding!
0:40
40
Rockhunting at Graveyard Point!
1:06
41
Botryoidal chalcedony!
0:19
42
Wash walkin'
0:34
43
Dark green metamorphic!
0:18
44
Pretty Orangey & Yella Quartzite!
0:21
45
Chalcedony Nodule!
0:31
46
Big Daddy Agate!
0:30
47
Reds!
0:27
48
Agate Chunk!
0:39
49
Beautiful Glow Quartz!
0:54
50
Iron Stained Quartz!
0:51
51
Yellow Agate Nodule!
0:48
52
White Iron Stained Quartz!
0:47
53
White Quartz!
0:47
54
Iron Stained Quartz!
0:46
55
Pretty Yellow Glow Nodule!
0:50
56
Thunderegg!
0:41
57
Half a Thunderegg w/Opal!
0:38
58
Botryoital Opal w/ A Little of Everything!
0:46
59
Pretty Red Jasper!
0:40
60
Succor Creek Canyon, OR.
0:49
61
Watch for Rocks!
1:09
62
Greens & Browns!
0:25
63
Big ol' nodule!
0:33
64
Hot Mess of agates!
0:40
65
White/Yellow Chalcedony!
0:34
66
Nodule w/ reds!
0:28
67
Spud 4!!!
0:18
68
Green Sandstone!
0:23
69
Botryoidal chalcedony!
0:27
70
Pretty greens!
0:27
71
Pretty red agates nodule!
0:24
72
Another nodule with reds!
0:27
73
Dinosaur Egg!
0:35
74
Into the "to be cut" box!
0:22
75
Geode?
0:30
76
Molten Sandstone?
0:27
77
Red!
0:25
78
Sandstone!
0:20
79
Example of minerals seeping into rocks!
0:28
80
Big lump of miscellaneous rocks!
0:17
81
82
Big Daddy Nodule!
0:16
83
Rockhounding near Mitchell Butte, OR
0:24
84
Love the Green!
0:23
85
Spud!
0:25
86
Chalcedony or Opal?
0:19
87
Mish Mash of Agate!
0:20
88
Shard of Agate!
0:24
89
Bright Red Agate!
0:19
90
Bright Green Agate!
0:19
91
Rusty Red Agate!
0:22
92
Colorful Agate!
0:27
Limestone!
0:22
94
Beautiful Reds! Jellybean Agate!
0:22
95
Jellybean Agate!
0:27
96
Definitely cut this one!
0:22
97
Colorful Jellybean Agate!
0:20
98
Big ol' Colorful Chuck of Agate!
0:18
99
Took forever to cut this one!
0:58
100
Thought this Thunderegg would be hollow!
0:34
101
Time to cut!
0:44
102
Opal or Chalcedony?
0:17
103
Botryoidal!
0:18
104
105
Chalcedony nodule!
0:16
106
Green & White Chalcedony!
0:18
107
It's hollow!
0:23
108
Some green!
0:16
109
110
111
Spot o' Orange!
0:15
112
Half Nugget!
0:14
113
114
115
116
117
118
Opal?
0:17
120
Lil' bowl!
0:17
121
Jasper chips!
0:18
122
124
125
Pretty green!
0:19
126
Love the red!
0:31
127
Layering!
0:19
128
Fire glow!
0:33
129
Glow cave!
0:39
130
Pretty glow!
0:27
132
Glow Chunk!
0:45
133
Half glow nugget!
0:32
134
Bright White!
0:28
135
Too bright!
0:31
136
Mellow yellow!
0:36
138
It's got teeth!
0:22
139
Petrified Wood?
0:15
140
Pretty chalcedony!
0:32
141
Colorful Shard!
0:13
143
144
145
Cool Banding!
0:20
146
147
Full of Opal!
0:18
148
Opal Inside!
0:16
149
150
Chalcedony!
0:18
151
Thunderegg Condo!!!
0:24
152
Chalcedony and Opal!
0:20
156
Cup Opal!!!
0:22
157
Hollow w/Opal!!!
0:54
158
Elongated Egg!!!
0:30
159
Is there more chalcedony inside?!?!
0:18
160
161
Cool Cut!!!
0:41
162
White & translucent opal inside!!!
0:34
163
Rock Cut Showcase!!!
1:16
165
Glow Chunk!
0:39
166
Too bright!
0:32
167
168
170
Another cave!!!
0:16
171
Creepy cave!!!
0:19
172
Cave full of thundereggs!
0:22
173
Long way down!
0:09
174
Succor Creek Canyon!
0:20
175
Graveyard Point
0:24

Limestone!

3 months ago
26

Limestone (calcium carbonate CaCO3) is a type of carbonate sedimentary rock which is the main source of the material lime. It is composed mostly of the minerals calcite and aragonite, which are different crystal forms of CaCO3. Limestone forms when these minerals precipitate out of water containing dissolved calcium. This can take place through both biological and nonbiological processes, though biological processes, such as the accumulation of corals and shells in the sea, have likely been more important for the last 540 million years. Limestone often contains fossils which provide scientists with information on ancient environments and on the evolution of life.

About 20% to 25% of sedimentary rock is carbonate rock, and most of this is limestone. The remaining carbonate rock is mostly dolomite, a closely related rock, which contains a high percentage of the mineral dolomite, CaMg(CO3)2. Magnesian limestone is an obsolete and poorly-defined term used variously for dolomite, for limestone containing significant dolomite (dolomitic limestone), or for any other limestone containing a significant percentage of magnesium. Most limestone was formed in shallow marine environments, such as continental shelves or platforms, though smaller amounts were formed in many other environments. Much dolomite is secondary dolomite, formed by chemical alteration of limestone. Limestone is exposed over large regions of the Earth's surface, and because limestone is slightly soluble in rainwater, these exposures often are eroded to become karst landscapes. Most cave systems are found in limestone bedrock.

Limestone has numerous uses: as a chemical feedstock for the production of lime used for cement (an essential component of concrete), as aggregate for the base of roads, as white pigment or filler in products such as toothpaste or paint, as a soil conditioner, and as a popular decorative addition to rock gardens. Limestone formations contain about 30% of the world's petroleum reservoirs

Loading comments...