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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 USA COLORADO POSTCARD 20699 RUGGED CLIFFS DEEP CANON RIVER MOUNTAIN ROCK SKY $9.09 Time Remaining: 1h 14m Buy It Now for only: $9.09 |
 La veta Colorado River and Rocks 1911 Postcard $8.00 Time Remaining: 1h 35m Buy It Now for only: $8.00 |
 USA CONN POSTCARD 21103 RIVER GILLETTE CASTLE ROCK OUTCROP HADLYME SHIP STERN BL $9.09 Time Remaining: 1h 43m Buy It Now for only: $9.09 |
 USA MASSACHUSETTS FALL RIVER 20566 POSTCARD ROLLING ROCK HISTORICAL MONUMENT $9.09 Time Remaining: 2h 1m Buy It Now for only: $9.09 |
 DavenportILEarly river front view from Rock Island $8.65 Time Remaining: 5h 27m Buy It Now for only: $8.65 |
 Norfolk Western Railway Scene Postcard Castle Rock on New River Virginia 1920s $4.20 Time Remaining: 5h 53m Buy It Now for only: $4.20 |
 SS Castle Rock Fishing Smith River CA c 1950s RPPC $6.95 Time Remaining: 5h 54m Buy It Now for only: $6.95 |
 Old Pre Linen Government Dam Rock River Sterling ILL $0.35 Time Remaining: 7h 39m |
 DIXON ILLINOIS ROCK RIVER TABERNACLE ASSEMBLY VINTAGE ANTIQUE POSTCARD FARINA IL $16.99 Time Remaining: 9h 46m Buy It Now for only: $16.99 |
 Rock Island river Scene on the Mississippi 1906 $12.95 Time Remaining: 9h 54m Buy It Now for only: $12.95 |
 Castle Rock Columbia River Highway POSTCARDS RPPC $5.00 Time Remaining: 10h 28m Buy It Now for only: $5.00 |
 DAVIS ILLINOIS ROCK RIVER VALLEY EE LILJEQUIST POETRY ANTIQUE VINTAGE POSTCARD $18.99 Time Remaining: 11h 18m Buy It Now for only: $18.99 |
 Little Rock Arkansas Postcard Point of Rock River Bridge circa 1920s $3.15 Time Remaining: 11h 42m Buy It Now for only: $3.15 |
 Vintage Postcard Toll Gate Rock Green River Lincoln Hwy US 30 Wyoming 1960 $0.99 Time Remaining: 11h 57m |
 West Virginia Postcard Hawks Nest Rock State Park New River Canyon View c1940s $3.15 Time Remaining: 12h Buy It Now for only: $3.15 |
 West Virginia Postcard Hawks Nest Rock State Park New River Gorge View c1960s $3.15 Time Remaining: 12h 7m Buy It Now for only: $3.15 |
 STERLING ROCK FALLS IL Government Dam over River 1913 $4.64 Time Remaining: 12h 21m Buy It Now for only: $4.64 |
 1915 Dixon Illinois Rock River Green Rock Scenic Hand Tinted Postcard $12.99 Time Remaining: 16h 53m Buy It Now for only: $12.99 |
 CA MONTECITO River Rock Road Hand Colored UN NA904 $18.00 Time Remaining: 17h 58m Buy It Now for only: $18.00 |
 USA ME POSTCARD 21384 PORTLAND HEAD LIGHT TOWER PELAGIC ZONE RIVER ROCK HOUSE $9.09 Time Remaining: 20h 8m Buy It Now for only: $9.09 |
 Elephant Feet Rocks Delaware River Sparrow Bush NY $7.50 Time Remaining: 1d 7m Buy It Now for only: $7.50 |
 Rock Bridge Postcard Red River Gorge Kentucky $1.00 Time Remaining: 1d 42m Buy It Now for only: $1.00 |
 USA CO POSTCARD 21861 RIVER NEEDLES ROCK MAZE HIGHWAY 66 ABORGINES MAZE SPIRITS $9.09 Time Remaining: 1d 52m Buy It Now for only: $9.09 |
 Scene on Conoquenessing River at Rock Point Park PA 1907 $10.00 Time Remaining: 1d 56m Buy It Now for only: $10.00 |
 WI BELOIT ROCK RIVER MAILED IN 1905 M11140 VERY EARLY $5.75 Time Remaining: 1d 2h 32m Buy It Now for only: $5.75 |
 Up River From Sliding Rock Dells of Wisconsin River Boat Postcard 1909 $6.99 Time Remaining: 1d 2h 53m Buy It Now for only: $6.99 |
 ZOLLARSVILLE ROAD NEAR WASHINGTON PA PENNSYLVANIA DIRT ROAD RIVER ROCKS $1.99 Time Remaining: 1d 4h 5m |
 BeloitWI Shades of Rock River $6.38 Time Remaining: 1d 4h 43m Buy It Now for only: $6.38 |
 Columbia River Oregon Postcard Rooster Rock Railroad Train Tracks c1910s Unused $0.99 Time Remaining: 1d 5h 4m |
 TABLE ROCK ROGUE RIVER OREGON POSTCARD 1908 RARE OLD REAL PHOTO $13.99 Time Remaining: 1d 5h 46m Buy It Now for only: $13.99 |
 310 CONOQUENESSING RIVER ROCK POINT PARK USA $2.36 Time Remaining: 1d 6h 2m |
 HOUSE ON THE ROCK SPRING GREEN WISCONSIN RIVER 102108 LL COOK JOBOUL POSTCARD 78 $7.50 Time Remaining: 1d 6h 4m Buy It Now for only: $7.50 |
 PC80 c1910 RPPC Connecticut River Valley From Indian Rock Charlestown NH $8.00 Time Remaining: 1d 8h 19m Buy It Now for only: $8.00 |
 Rummels Landing Rock River IL old 1900s postcard $6.77 Time Remaining: 1d 8h 43m Buy It Now for only: $6.77 |
 Rock River Rummels Landing IL Upstream old postcard $6.77 Time Remaining: 1d 8h 51m Buy It Now for only: $6.77 |
 Virginia Postcard Castle Rock New River 3 Men Boat White Border c1920s $3.15 Time Remaining: 1d 8h 56m Buy It Now for only: $3.15 |
 Rock River from Castle Rock near Oregon IL Ogle PC $4.08 Time Remaining: 1d 10h 14m Buy It Now for only: $4.08 |
 Waupun Wisconsin cir 30 40s Rock River Country Club WI $6.75 Time Remaining: 1d 10h 52m Buy It Now for only: $6.75 |
 Marble Rock Iowa 1909 Shell Rock River Bridge Dif IA $8.99 Time Remaining: 1d 11h 4m Buy It Now for only: $8.99 |
 PostcardTable Rock DamWhite RiverBransonMissouri MO $3.95 Time Remaining: 1d 11h 13m Buy It Now for only: $3.95 |
 1926 POSTCARD LOVERS LANE NEAR STEAMBOAT ROCK DELLS OF WISCONSIN RIVER WI $6.99 Time Remaining: 1d 11h 58m Buy It Now for only: $6.99 |
 1910 POSTCARD ROCK POINT PARK PA CONOQUENESSING RIVER BRIDGE BEAVER $9.95 Time Remaining: 1d 13h 2m |
 1909 Color Postcard 4235 SCENE NEAR DE KALB Missouri Nature Deer River Rocks $9.50 Time Remaining: 1d 13h 12m Buy It Now for only: $9.50 |
 Rock Island Illinois Postcard Blackhawk State Park Rock River Dam 1942 Postmark $3.15 Time Remaining: 1d 13h 30m Buy It Now for only: $3.15 |
 vintage 1940s Illinois River at Buffalo Rock State Park Linen postcard $6.49 Time Remaining: 1d 14h 11m Buy It Now for only: $6.49 |
 1957 Table Rock Dam White River Missouri Ozarks $4.50 Time Remaining: 1d 15h 50m Buy It Now for only: $4.50 |
 OR COLUMBIA RIVER CASTLE ROCK MAILED 1907 M13907 EARLY $5.75 Time Remaining: 1d 23h 8m Buy It Now for only: $5.75 |
 ANGLE ROCK INTERSTATE PARK ST CROIX RIVER WI 1921 $12.97 Time Remaining: 1d 23h 19m Buy It Now for only: $12.97 |
 Postcard Beacon Rock Columbia River $2.97 Time Remaining: 1d 23h 45m Buy It Now for only: $2.97 |
 1914 Lone Rock Columbia River OR postcard view $3.95 Time Remaining: 1d 23h 48m Buy It Now for only: $3.95 |
 BYRON IL 1914 Gr Western RR Bridge over Rock River RPPC $65.00 Time Remaining: 1d 23h 49m Buy It Now for only: $65.00 |
 Postcard Toll Gate Rock and Green River $2.97 Time Remaining: 2d 1h 25m Buy It Now for only: $2.97 |
 WV NEW RIVER CANYON FROM HAWKS NEST ROCK STATE PARK LINEN UNUSED 040626 $5.25 Time Remaining: 2d 1h 30m Buy It Now for only: $5.25 |
 Towanda Pa Table Rock Mountain River Bradford County Postcard 21504 $4.40 Time Remaining: 2d 1h 41m Buy It Now for only: $4.40 |
 Postcard The Red Rocks and Wind River near Dubois $2.97 Time Remaining: 2d 1h 47m Buy It Now for only: $2.97 |
 Rock Island IL Mississippi River Steam boating c1910 Postcard $5.89 Time Remaining: 2d 2h 24m Buy It Now for only: $5.89 |
 RPPC KLAMATH RIVER MOUTH SALMON FISHING OLD REAL photo tucker Rock Ca California $8.89 Time Remaining: 2d 2h 30m Buy It Now for only: $8.89 |
 OREGON WASHINGTON Columbia River Rooster Rock 1940s OR WA postcard $7.95 Time Remaining: 2d 3h 33m Buy It Now for only: $7.95 |
 WASHINGTON Evergreen Highway view of Beacon Rock Columbia River 1935 WA postcard $4.95 Time Remaining: 2d 5h 9m Buy It Now for only: $4.95 |
 OREGON Columbia River Gorge Castle Rock 1910 OR postcard $8.95 Time Remaining: 2d 5h 15m Buy It Now for only: $8.95 |
 Flathead County Montana MT 1908 Bad Rock Canyon River $6.00 Time Remaining: 2d 5h 19m Buy It Now for only: $6.00 |
 MAINE Kennebunk River Boating at Picnic Rocks 1907 ME postcard $8.95 Time Remaining: 2d 5h 31m Buy It Now for only: $8.95 |
 View Rock River Castle Rock Oregon Illinois Old Postcard Color View Rivers $1.99 Time Remaining: 2d 5h 50m Buy It Now for only: $1.99 |
 ILLINOIS Rock Island boating in the Moonlight Mississippi River 1911 IL postcard $8.95 Time Remaining: 2d 6h 12m Buy It Now for only: $8.95 |
 undivided rooster rock columbia river oregon postcard $7.99 Time Remaining: 2d 6h 38m Buy It Now for only: $7.99 |
 OREGON Columbia River Castle Rock Fish Wheels RPPC 1940s OR real photo postcard $8.95 Time Remaining: 2d 6h 40m Buy It Now for only: $8.95 |
 VINTAGE Postcard LONE ROCK LOWER DELLS WISCONSIN RIVER $2.99 Time Remaining: 2d 6h 43m Buy It Now for only: $2.99 |
 ILLINOIS Oregon Rock River Black Hawk Statue RPPC 1940s IL real photo postcard $8.95 Time Remaining: 2d 6h 49m Buy It Now for only: $8.95 |
 Postcard 931101 Boats Rock River Lakewood OH 6821 $2.75 Time Remaining: 2d 6h 52m Buy It Now for only: $2.75 |
 KENTUCKY Louisville Ohio River at Rock Island 1910 KY postcard $8.95 Time Remaining: 2d 7h 55m Buy It Now for only: $8.95 |
 IA DECORAH Upper Iowa River Pulpit Rock UDB UN L531 $14.00 Time Remaining: 2d 8h 10m Buy It Now for only: $14.00 |
 IL GRAND DETOUR 1000 ISLAND ROCK RIVER ALBERTYPE R29015 $15.00 Time Remaining: 2d 8h 16m Buy It Now for only: $15.00 |
 COLUMBIA RIVER GORGE EAST ROOSTER ROCK CROWN POINT $8.99 Time Remaining: 2d 8h 34m Buy It Now for only: $8.99 |
 WV MORGANTOWN CHEAT RIVER SQUIRREL ROCK 1918 T43789 $15.00 Time Remaining: 2d 9h 30m Buy It Now for only: $15.00 |
 Oregon Giant head Rock Columbia River Pre Linen Unused Early 1900s ORE OR $4.95 Time Remaining: 2d 9h 34m Buy It Now for only: $4.95 |