Rock River
How long would say river rock stay warm after being placed in a fire to heat up? How long would...?
soapstone stay warm? what other type rocks would hold the heat the longest and how long would that be?
It depends on the size of the piece of stone. The time it will stay warm is
a. proportional to the heat capacity,
b. inversely proportional to the square of the linear size, and
c. inversely proportional to the thermal conductivity.
The thermal conductivity varies between types of stone, and in some times is different for different directions! See the Brittanica link.
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 POST CARD BIG ROCK CANDY MOUNTAIN UTAH SEVIER RIVER US 89 RICHFIELD UTAH $3.99 Time Remaining: 2h 43m |
 Governmant Bridge over Mississippi River Rock IslandIl $4.91 Time Remaining: 8h 48m Buy It Now for only: $4.91 |
 1919 COLUMBIA RIVER Highway Oregon Real Photo Postcard CASTLE ROCK Boats ASTORIA $6.00 Time Remaining: 10h 22m Buy It Now for only: $6.00 |
 Postcard Along Scenic Rock RIver Oregon IL 1908 $13.00 Time Remaining: 11h 8m Buy It Now for only: $13.00 |
 1910 Postcard Wagon Bridge Rock River Janesville WI $9.99 Time Remaining: 12h 43m Buy It Now for only: $9.99 |
 Moonlight Rock River Country Club Rockford IL Postcard $4.00 Time Remaining: 12h 55m Buy It Now for only: $4.00 |
 1905 ROCK ISLAND ILL POSTCARD GOVERNMENT BRIDGE RIVER $8.50 Time Remaining: 13h 43m Buy It Now for only: $8.50 |
 Old PostcardBalancing RockWillamette River Oregon OR $3.95 Time Remaining: 14h 30m Buy It Now for only: $3.95 |
 1950s Woman on Wyalusing Rock Susquhanna River near Towanda PA Vintage Postcard $4.95 Time Remaining: 15h 32m Buy It Now for only: $4.95 |
 Linen Postcard+Stand Rock Dells River Wisconsin WI $3.95 Time Remaining: 15h 37m Buy It Now for only: $3.95 |
 Antique 1925 POSTCARD The CONCHO RIVER at Paint Rock TEXAS $9.77 Time Remaining: 16h 35m |
 VINTAGE DIVIDED BACK UNUSED POST CARD ROLLING ROCK FALL RIVER MASSACHUSETTS $6.95 Time Remaining: 18h 3m Buy It Now for only: $6.95 |
 10 9 1912 BeloitWI Rock River Paper Mill 1 cent stamp $24.50 Time Remaining: 18h 4m Buy It Now for only: $24.50 |
 2fp Green River WY Tea Kettle Rock $5.00 Time Remaining: 20h 41m Buy It Now for only: $5.00 |
 PORTLAND OREGON COLUMBIA RIVER CASTLE ROCK POSTCARD $9.99 Time Remaining: 20h 55m Buy It Now for only: $9.99 |
 View of the Columbia River from Rooster Rock Oregon OR Vintage Postcard $8.99 Time Remaining: 22h 3m Buy It Now for only: $8.99 |
 Arrow Rock Dam Boise River Idaho postcard $7.00 Time Remaining: 22h 40m Buy It Now for only: $7.00 |
 WHITE MTS NH Moosilauke River Rocks RPPC Vtg Postcard $8.75 Time Remaining: 23h 36m Buy It Now for only: $8.75 |
 Shell Rock Iowa 1912 Old River Steel Span Bridges IA $4.99 Time Remaining: 1d Buy It Now for only: $4.99 |
 1930s Castle Rock Pineville WV Guyandotte River Natural Rock 1B 689 Color PC $5.75 Time Remaining: 1d 25m |
 IL ROCK FALLS STERLING DAM ON ROCK RIVER M12961 EARLY $7.75 Time Remaining: 1d 9h 33m Buy It Now for only: $7.75 |
 Wisconsin Fort Atkinson Rock River $3.00 Time Remaining: 1d 12h 18m Buy It Now for only: $3.00 |
 Table Rock Dam White River Ozarks Missouri MO Postcard $2.99 Time Remaining: 1d 12h 36m Buy It Now for only: $2.99 |
 1926 Real Photo Postcard COLUMBIA RIVER GORGE BEACON ROCK RPPC $5.00 Time Remaining: 1d 14h 39m Buy It Now for only: $8.00 |
 PC DB OREGON OR Castle Rock on the Columbia River Postcard Vintage Color View $3.99 Time Remaining: 1d 14h 44m Buy It Now for only: $3.99 |
 OREGON ILL POSTCARD ROCK RIVER FROM HEMMINGWAY ROCKS $9.75 Time Remaining: 1d 16h 5m Buy It Now for only: $9.75 |
 Castle Rock Seen From The Columbia River Highway WA $3.00 Time Remaining: 1d 16h 15m |
 Looking up Wisconsin River Showing Chimney Rock WI PC $4.75 Time Remaining: 1d 16h 39m Buy It Now for only: $4.75 |
 1906 RawlingWY Green River Main Street Storefronts Castle Rock Sweetwater Cty $8.00 Time Remaining: 1d 17h 9m |
 Geneseo IL Fones Camp Grounds Rock River Postcard $6.99 Time Remaining: 1d 18h 26m Buy It Now for only: $6.99 |
 Linen PostcardMcKees Rocks Bridge Ohio River BlvdPittsburghPennsylvania $3.95 Time Remaining: 1d 19h 26m Buy It Now for only: $3.95 |
 Linen Postcard Black Hawk Monument Eagles Nest Bluff Rock River ValleyIllinois $3.95 Time Remaining: 1d 19h 44m Buy It Now for only: $3.95 |
 WB Winter Scene Rock River The Shades Resort IN $4.00 Time Remaining: 1d 21h 27m Buy It Now for only: $4.00 |
 Scene on White River Calico Rock AR 1938 $5.99 Time Remaining: 1d 21h 54m Buy It Now for only: $5.99 |
 UP THE RIVER FROM SLIDING ROCK DELLS OF THE WISCONSIN RIVER 1909 POSTCARD $4.99 Time Remaining: 1d 22h 2m |
 Cheat River Gorge Lookout P Coopers Rock WEST VIRGINIA $3.99 Time Remaining: 1d 22h 31m Buy It Now for only: $3.99 |
 Castle Rock Columbia River Highway POSTCARDS RPPC $5.00 Time Remaining: 1d 23h 39m Buy It Now for only: $5.00 |
 BLUE RIVEROREGON FINNS ROCKMcKENZIE HWY 1910s SPARKS RANCH RPPC REAL PHOTO $12.00 Time Remaining: 1d 23h 53m |
 Steamboat Rock Iowa c1939 RPPC Iowa River Dam Farm IA $11.99 Time Remaining: 2d 13m Buy It Now for only: $11.99 |
 War Dance Stand Rock Indian Ceremonial Wisconsin River WI 1949 PC $2.99 Time Remaining: 2d 44m Buy It Now for only: $2.99 |
 Vintage Balancing Rock to the Wilamette River OR $8.99 Time Remaining: 2d 2h 46m Buy It Now for only: $8.99 |
 Rock River Grand Detour Illinois 2 RPPC Photo Postcards $17.99 Time Remaining: 2d 12h 23m Buy It Now for only: $17.99 |
 Steamboat Rock Iowa c1939 RPPC Iowa River Cliffs IA $16.99 Time Remaining: 2d 12h 36m Buy It Now for only: $16.99 |
 PC DB The Dalles of the St Croix River Wisconsin WI Devils Chair Rocks Postcard $3.99 Time Remaining: 2d 14h 3m Buy It Now for only: $3.99 |
 POSTCARD USA BEACON ROCK ON THE COLUMBIA RIVER $1.56 Time Remaining: 2d 14h 36m Buy It Now for only: $1.56 |
 IL GRAND DETOUR ROCK RIVER VERY EARLY ALBERTYPE T83905 $15.00 Time Remaining: 2d 14h 39m Buy It Now for only: $15.00 |
 COLUMBIA RIVER OR 1911 Castle Rock Sailboats Postcard $5.99 Time Remaining: 2d 15h 27m Buy It Now for only: $5.99 |
 D7152 IL Geneseo Rock River View Postcard $7.99 Time Remaining: 2d 15h 42m Buy It Now for only: $7.99 |
 WY GREEN RIVER Castle Rock Town Panorama RPPC PM 46 5273 $18.00 Time Remaining: 2d 18h 6m Buy It Now for only: $18.00 |
 RPPC CA YOSEMITE NATL PARK SENTINEL ROCK MERCED RIVER $4.75 Time Remaining: 2d 18h 58m Buy It Now for only: $4.75 |
 View James River White Rock Hill Lynchburg VA postcard $9.00 Time Remaining: 2d 19h 57m Buy It Now for only: $9.00 |
 COLUMBIA RIVER HIGHWAY OR TOOTH ROCKS NEAR EAGLE CREEK $21.97 Time Remaining: 2d 20h 20m Buy It Now for only: $21.97 |
 1906 Beloit WI Postcard Rock River Looking North $6.00 Time Remaining: 2d 22h 42m Buy It Now for only: $6.00 |
 Columbia River St Peters Dome Castle Rock in distance postcard $3.99 Time Remaining: 3d 28m Buy It Now for only: $3.99 |
 Gold Ray Dam Oregon OR 1912 Table Rock Rogue River Vintage Postcard $9.99 Time Remaining: 3d 50m Buy It Now for only: $9.99 |
 RPPC Rock River Bridge Prophetstown ILL $4.00 Time Remaining: 3d 1h 8m |
 Columbia River HighwayOR Rooster Rock $4.15 Time Remaining: 3d 2h 31m Buy It Now for only: $4.15 |
 SOUTH BANK RIVER LITTLE ROCK AR ARKANSAS POSTCARD $4.75 Time Remaining: 3d 12h 39m Buy It Now for only: $4.75 |
 PA WYALUSING WYALUSING ROCK AND SUSQUEHANNA RIVER PENNSYLVANIA LINEN POSTCARD $5.98 Time Remaining: 3d 13h 16m Buy It Now for only: $5.98 |
 Postcard Red Rocks Wind RiverDuboisWyoming WY $3.95 Time Remaining: 3d 14h 17m Buy It Now for only: $3.95 |
 Old Postard Giant Head Rock Columbia River Oregon OWRN $3.95 Time Remaining: 3d 14h 24m Buy It Now for only: $3.95 |
 Missouri NOEL Elk River Ozarks Hwy 71 Hanging Rocks $6.12 Time Remaining: 3d 15h 4m Buy It Now for only: $6.12 |
 RPPC GREEN RIVER WY CASTLE ROCK OLD CARS REAL PHOTO Wyo Wyoming $6.15 Time Remaining: 3d 17h 9m Buy It Now for only: $6.15 |
 Cottonwood River below Flat Rocks Emporia Kansas 1913 $3.99 Time Remaining: 3d 20h 49m Buy It Now for only: $3.99 |
 Beacon Rock 16 Acres at Base Columbia River OR RPPC $5.99 Time Remaining: 3d 20h 52m Buy It Now for only: $5.99 |
 1910 Postcard Ragged Rocks Mohawk River Little Falls NY $9.99 Time Remaining: 3d 21h 46m Buy It Now for only: $9.99 |
 Susquehanna River Railroad from Chickies Rock in Columbia PA 1912 $7.57 (2 Bids) Time Remaining: 3d 21h 49m |
 1918 POSTCARD JANESVILLE WI ROCK RIVER BUSINESS VIEW $9.95 Time Remaining: 3d 21h 51m Buy It Now for only: $9.95 |
 RPPC Castle Rock Green River WY Sanborn 1950s Wyoming $6.00 Time Remaining: 3d 22h 18m |
 Oregon Cape Horn Lone Rock Columbia River Scene $3.50 Time Remaining: 3d 22h 25m Buy It Now for only: $3.50 |
 EVANSTON Wyoming 1911 BIG ROCK on BEAR RIVER $15.00 Time Remaining: 3d 22h 41m Buy It Now for only: $15.00 |
 OLD CHICAGO NORTH WESTERN BRIDGE OVER ROCK RIVERJANESVILLEWISCONSIN LK $4.99 Time Remaining: 3d 22h 55m |
 Government Dam Rock River Sterling IL Vintage Postcard $3.00 Time Remaining: 3d 23h 35m Buy It Now for only: $3.00 |
 WI View of Chimney Rock Dells of the Wisconsin River Wisconsin Postcard PC $0.50 Time Remaining: 4d 44m |
 RPPC Sterling IL Illinois Bluffs Along Rock River Real Photo Postcard 1908 $12.99 Time Remaining: 4d 5h 55m Buy It Now for only: $12.99 |