Susan asks…
what can i do with rocks i've collected?
for years now, i have slowly built up a collection of really unusual pretty rocks. its not really a hobby but if i am someplace like an agate beach or anywhere there are lots of cool rocks i will bring a couple of them home. SO. now i have these rocks and although i am a crafter, i cannot think of anything to do which would display them in a nice way. i have thought of those little meditation waterfalls but its too involved. i need something simple. just a way to display their beauty, maybe on one of the porches or garden or something. i am blank when it comes to decorating anyway! i know this sounds lame, but its not a joke!)
admin answers:
Our family loves to collect rocks, too. I made a beautiful rock "shelf" out of our rocks. I gathered some of our favorite rocks of all sizes and used landscape glue (typically used for building keystone walls) and glued them together to form a shelf. I used the flattest stones for the top of the shelf, then tapered the rocks underneath this ledge to form a point. I hung the shelf on our mud room wall. Everyone who sees the shelf, really likes it. The shelf is kind of hard to explain without pictures, but if you were looking straight at the shelf, it is in the shape of an upside-down triangle - the point being at the bottom. If you looked at the shelf from the side view, it looks like half a pyramid. I sealed the rocks with Delta Dreamcoat Gloss Varnish. The shelf was really easy to make and looks great.
You could also use a cement drill bit and drill a hole through 5 to 7 rocks of various sizes. Place a piece of rod stock through the holes and stack the rocks to form a cairn. Here's an example of this project: http://www.escapadedirect.com/stonecairn.html
I hope this helps!
Daniel asks…
Anyone know anything about agates?
I live in Alaska and we are always out looking for agates on the beach, We have found white ones and yellow ones and ones that are almost black. I have searched everywhere on the internet to find information on them but can never find this kind.. Does anyone know if these are agates or if they are worth anything? Just plain curiousity
admin answers:
Tons of agate information on the internet:
alaskan agates:
http://www.rockhounding.net/alaska/archives/rocks-minerals/agates.jsp
http://minerals.usgs.gov/minerals/pubs/commodity/gemstones/sp14-95/chalcedony.html
agates in general:
http://en.wikipedia.org/wiki/Agate
You might also want to remember that is agates, which is basically just chalcedony the color is created by trace elements (elements or compounds that exist in very small amounts) and so do not really determine much except the color and patterns.
Having said that, anything that is very unsual is worth something.
Betty asks…
looking for person named "JACQUES" living in redding CA age 28-40?
met you on the beach sat. aug.4,trinadad at stone lagoon. we were collecting green rocks, i gave you a small agate.you were there with a friend from redding who is a nurse.you said that your dad gave you your name.im looking for you.
this person is a male about 5'9 to 6' ft dark short hair muscular , good looking,and very nice. i have no last name
admin answers:
If you had her last name that would be helpful...
Jenny asks…
What do we all love about geology?
1. Physically precipitated (chemical) limestone that forms in caves is termed _______.
a. jasper
b. agate
c. travertine
d. dolostone
ANSWER: c
2. Chemical and biochemical rocks are classified primarily on the basis of _______.
a. degree of sorting
b. mineral composition
c. grain size
d. angularity
ANSWER: b
3. The removal of detritus from weathered rock at an outcrop is termed _______.
a. weathering
b. erosion
c. deposition
ANSWER: b
4. The breakdown of exposed rock into small fragments and dissolved ions is termed ______.
a. erosion
b. deposition
c. weathering
ANSWER: c
5. A clastic rock comprised of sand-sized grains derived from the physical weathering of granite and containing a sizable proportion of feldspar is termed _______.
a. arkose
b. lithosandstone
c. graywacke
d. metasandstone
ANSWER: a
6. Diagenesis refers to _______.
a. the development of layering within sedimentary rocks
b. the act of deposition of sediment, which will ultimately form sedimentary rock
c. physical and chemical alterations, including compaction and cementation, that occur as sediment is transformed into rock
ANSWER: c
7. A sandstone with a large proportion of feldspar due to the physical weathering of granite is more precisely termed a(n) _______.
a. wacke
b. greywacke
c. arkose
d. breccia
ANSWER: c
8. As compared with metamorphism, diagenesis ________.
a. takes place at higher temperatures and pressures
b. takes place at greater depths that are well within the mantle
c. takes place at lower temperatures and pressures
d. means exactly the same thing
ANSWER: c
9. The difference between breccia and conglomerate is that conglomerate ______.
a. possesses more rounded grains than breccia
b. is finer-grained than breccia
c. possesses more angular grains than breccia
d. is coarser-grained than breccia
ANSWER: a
10. A well-sorted sandstone with asymmetric ripples was most likely deposited as sand ______.
a. by a glacier
b. in a river bed
c. in an alluvial fan
d. on a beach
ANSWER: b
11. Geologically, medium-sized sediment refers to _______.
a. silt
b. sand
c. pebbles
d. cobbles
ANSWER: b
12. Unlike physically precipitated chert, biochemical chert _______.
a. is bedded (layered)
b. is made up of the skeletons of radiolaria and foraminifera
c. does not occur as small nodules within bodies of limestone
d. all of the above
ANSWER: d
13. Lithified detritus (breakdown products of preexisting rocks) forms which kind of sedimentary rock?
a. organic
b. clastic
c. chemical
d. biochemical
ANSWER: b
14. Of the grains above, which is more rounded?
a. Neither, both grains possess approximately equal roundness.
b. grain B
c. grain A
ANSWER: c
15. Most sorting of detrital grains takes place during ______.
a. transportation
b. deposition
c. weathering
d. erosion
ANSWER: not a
16. Finding mudstone, chalk, and chert together at outcrops suggests that the ancient environment represented was ______.
a. deep marine
b. a delta
c. a lake
d. shallow marine
ANSWER: a
17. A fine-grained clastic rock that splits into thin sheets is ______.
a. mudstone
b. sandstone
c. shale
d. arkose
ANSWER: c
18. Which type of sediment settles at greater fluid velocities than sand?
a. clay
b. mud
c. silt
d. gravel
ANSWER: d
19. Grains become rounded primarily during ______.
a. deposition
b. erosion
c. transportation
d. weathering at outcrop
ANSWER: not d
20. Because the velocity of sediment settling (deposition) is positively related to grain size for waterborne sediments, fluvial deposits are more likely than glacial deposits to ______.
a. have angular grains
b. include fine grains, such as clay
c. include coarse grains, such as cobbles
d. be well sorted
ANSWER: d
21. Which transport medium carries the largest particles?
a. wind
b. ice
c. water
ANSWER: b
22. Which environment would most likely produce sedimentary deposits characterized by very well-sorted, very well-rounded grains that are nearly pure quartz?
a. alluvial fan
b. river
c. glacier
d. beach
ANSWER:
23. Bedding refers to ____________.
a. physical and chemical alterations, including compaction and cementation, that occur as sediment is transformed into rock
b. the development of layering within sedimentary rocks
c. the act of deposition of sediment, which will ultimately form sedimentary rock
ANSWER: b
24. When limestone becomes chemically altered so that half of the calcium atoms are replaced by magnesium, the resultant rock is termed ____________.
a. agate
b. jasper
c. dolostone
d. travertine
ANSWER: c
25. The smallest detrital grains are ____________.
a. silt
b. sand
c. gravel
d. clay
ANSWER: d
26. The thickest sequences of sedimentary rocks are typically found in ____________.
a. the oceans, beside the mid-ocean ridges
b. mountain belts, broad areas where rock and sediment are uplifted
c. sedimentary basins, broad depressions that catch sediment
d. the interior of the largest continents
ANSWER: c
27. Clastic sedimentary rocks are primarily classified on the basis of _______
a. grain size
b. mineral composition
c. degree of sorting
d. angularity
ANSWER: b
28. Sea level rises locally, and marine sediments are deposited on top of terrestrial sediments during events termed ____________.
a. divarications
b. transgressions
c. regressions
ANSWER: b
29. Physical precipitation of gypsum due to evaporation of seawater produces which kind of sedimentary rock?
a. clastic
b. chemical
c. biochemical
d. organic
ANSWER: b
admin answers:
Looks like you've got it figured out
Carol asks…
where can agates be found?
id like to get into finding Agates, but i dont know where to find them.... can you just dig them out of the Earth or do you find them on river bank and beaches?
admin answers:
Agates are usually formed in cavaties in lava flows, so they tend to be found in places with igneous geology. If streams or rivers flow over these igneous rocks, they can wash out as nodules and be deposited with other pebbles along the banks or bed of the river.
Check with your local geological society to see if any agates have been found in your area.
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