Geology: ", "modifiers": {}}, {"text": "Is there anywhere in the US I can find rocks that are at least a billion years old?

Shenandoah National Park map

Precambrian rocks are from 3 billion to 600 million years old.

In the United States rocks of this age are found in the cores of the major mountain ranges.

They also occur in the Lake Superior region and in a few localities in the southwest.

The coloured areas of the map below are Precambrian rocks.

,,,Precambrian Geology can be found in the following US National Parks: ,Blue Ridge Parkway, North Carolina and Virginia,Great Smoky Mountains National Park, North Carolina and Tennessee,Isle Royale National Park, Michigan,Keweenaw National Historic Park, Michigan,Shenandoah National Park, Virginia,Voyaguers National Park, Minnesota,Black Canyon of the Gunnison National Park, Colorado,City of Rocks National Reserve, Idaho,Colorado National Monument, Colorado,Glacier National Park, Montana,Grand Canyon National Park, Arizona,Grand Teton National Park, Wyoming,Lake Mead National Recreation Area, Nevada,Mount Rushmore National Memorial, South Dakota,Rocky Mountain National Park, Colorado

Map of Skyline Drive and Blue Ridge Parkway

Blue Ridge Parkway, especially in the fall.

Its absolutely stunning.

,The BRP is 469 miles (755 km) long.

It starts at Rockfish Gap near Waynesboro, VA and then runs south to U.

S.

441 near Cherokee, NC:,Blue Ridge Parkway - Interactive MapTheres no fee for using the parkway, which is nice.

I believe the speed limit never gets above 45 mph, so driving straight through at that speed would take about 10.

5 hours.

There are some sections with lower speed limits, I think.

,The number of days for the trip really depends on what you want to do.

You can do the whole thing, or just a section.

The website with the map above has lots of great links about where to stop, what to do, and where to stay--like I said, it all depends on what interests you and what time/money constraints you have.

,If you have time, Skyline Drive in Shenandoah National Park is another gorgeous ~100 mile drive.

Its just north of Waynesboro, where the BRP starts in Virginia.

Shenandoah Valley

Thanks for the A2A and I wish I could be of more help.

,From my two years in Harrisonburg my observation of local cuisine were of the following.

,1.

Southern food is predominant.

This mostly means biscuits and gravy and fried chicken,2.

The valley is known for amazing fruit so pies (Apple, peach etc) and other fruit based desserts were big,3.

There were multiple chili cook offs the years that I was there so I imagine its enjoyed locally,4.

The state and county fairs were famous and well attended so typical fair food was enjoyed by many - deep fried Oreos, twinkies, funnel cake,As I am vegetarian I didnt partake in a lot of local cuisine so I may not be the best person to answer this but I hope I helped.

Blue Ridge Parkway National Park

Letu2019s start with the basics.

,It takes 7.

5 to 8 hours to drive from Sevierville, Tennessee to Washington D.

C.

,Depending on how much of the Blue Ridge Parkway you use, that could add another 1.

5 to 3 hours.

That means you will be on the road for at least 9 to 11 hours.

,This does not include any stops for food, bathroom breaks, and any side stops to check out the sights.

I mean you are traveling to a US National Park.

You REALLY need to see some of it without a window in your way.

,Since most of your drive will be getting to Shenandoah and the days are getting shorter, I think the idea of getting to Washington D.

C.

late is not the problem.

,A better question would be how early do you want to get up to take advantage of the daylight?When you figure out exactly what you want to see and where, then you can plan backwards to your departure time.

Blue Ridge Parkway map

Precambrian rocks are from 3 billion to 600 million years old.

In the United States rocks of this age are found in the cores of the major mountain ranges.

They also occur in the Lake Superior region and in a few localities in the southwest.

The coloured areas of the map below are Precambrian rocks.

,,,Precambrian Geology can be found in the following US National Parks: ,Blue Ridge Parkway, North Carolina and Virginia,Great Smoky Mountains National Park, North Carolina and Tennessee,Isle Royale National Park, Michigan,Keweenaw National Historic Park, Michigan,Shenandoah National Park, Virginia,Voyaguers National Park, Minnesota,Black Canyon of the Gunnison National Park, Colorado,City of Rocks National Reserve, Idaho,Colorado National Monument, Colorado,Glacier National Park, Montana,Grand Canyon National Park, Arizona,Grand Teton National Park, Wyoming,Lake Mead National Recreation Area, Nevada,Mount Rushmore National Memorial, South Dakota,Rocky Mountain National Park, Colorado

Map of Skyline Drive entrances

Short answer: yes, in many different ways, but there are definitely some problematic areas that need to be avoided.

,Im a motorcyclist who vastly prefers to take windy, low-traffic roads even on a cross-country trips.

We have a mantra, Back roads, period! I first tried to achieve an Interstate-free crossing from the east coast to the Rockies, from Catoctin MD to Boulder CO by way of the Ozarks, back in the mid-90s.

It was 99% successful but for a short, unavoidable stretch of I-25 heading south out of Raton, NM.

Skipping US highways would have been even harder, especially given the maps we had at the time, particularly for crossing the Mississippi.

,The rules are slightly vague in this question, but Ill try to handle one possible route in what seems to be the spirit of the question.

Ill take it as meaning crossing from one land border to the opposite land border, and that an at-grade crossing of a US route doesnt count as driving on the highway -- as Brice Fleckenstein points out, if crossing one counts as driving on it, then no, its impossible and trivializes the question.

Also, Ill interpret cases of a US route number running coincident with a state route number as making that stretch of road ineligible, despite being able to represent the directions without using US routes.

Iu2019m also taking u201cU.

S.

Highwaysu201d as meaning the common usage of the numbered route system, per US Highway - Wikipedia.

,Start at the Canadian border by Fort Covington, NY.

NY 37 got to NY 30, crossing US 11, and 30 gets you all the way down to the other side of NY near Hancock, with old NY 17 (now County Road 17) getting you the rest of the way to the Pennsylvania border.

NY 17 is becoming I-86, so these directions remain faithful to the question even after that happens.

,Crossing northern PA there are a multitude of ways to get to the middle of the state without violating the rules; Ive done it many times on my backroads trips while explicitly avoiding US 6 myself.

Basically 370, 171, 374, 92 get you down near US 6, then take named roads around the north of Tunkhannock and over to 87.

87 takes you all the way to near Montoursville, then 973 and Nichols Run Road bring you into Jersey Shore where 44 gets you across the river.

Then 880, 192, 445, 45, and 235 bring you down to Beaver Springs.

Step across US 522 there on a village street, then rejoin 235 to 333 and 75 to the Maryland border.

,In Maryland, Mercersburg Rd brings you down toward Clear Spring, and a little jog puts you on MD 68 to 63, 65 and 64 across the Potomac into West Virginia.

,WV 480 gets you most of the way across to VA, and using WV county roads and VA 3-digit routes it is possible to avoid the pitfalls of USs 50, 340, and 522 to get to Front Royal.

For example, CR 1 to CR 13/1 in WV, to 672, 671, 632, 657, 652, 620, and 255 finally brings you to 625 into Front Royal, where I admit my plan to get on Skyline Drive was thwarted by the fact that its northern entrance -- in fact, all of its entrances -- is accessible only by a US route.

However, you can get down the Shenandoah Valley while avoiding breaking the rules, but it was a little harder than I expected thanks to US 340, US 522, and the rivers.

Backtracking a little up 624 to the north side of the Shenandoah River, you can pick your way west on the 3-digits to pick up VA 55 back east from Strasburg, leading to 678 (a lovely motorcycling road) down the northern part of the valley.

675 brings you into Luray (stop by the famous scenic caverns!) and after working through town then 616, Wampler Rd, 650 and 602 get you to Shenandoah.

602, 644 and 646 will let you avoid USs 340 and 33, then south of 33 take 996, 672, 253, 605, and 865 all the way down to Waynesboro.

You can finally get across US 340 (and the new confounder, US 250) on the city grid here, and take 624 out of town to 664 and 610, finally reaching the top of the Shenandoah Mountains that Id aimed for 100 miles to the north.

The Blue Ridge Parkway, while a federal road, is not part of the US Highway system of number routes, and is now going to take us a nice long way, over 400 miles into western North Carolina.

,It gets tough in the southern Appalachians though because the rugged terrain means that mostly the through roads that exist to cut through the mountains were all funded by federal dollars.

There are a lot of great scenic state roads in the area, but they mostly all connect directly to US routes without any suitable tertiary road alternative.

Our goal here is to get out of the mountains, despite how delightful they are, where state roads can finally drop us to the Gulf Coast.

,One way to do this is to finally exit the Blue Ridge Parkway just south of Asheville on NC 191.

Take it to NC 225 at Hendersonville, then enter South Carolina on CR 969 (which is *old* US 25 but HA).

Branch off on CR 119, taking that to 526 into Slater-Marietta, where you can artfully dodge through a parking lot to cross US 276 on SC 288.

With Cherokee Hills Drive, thatll connect you to SC 11, which was sadly unusable before because it ran coincident with US 276 for a bit.

Stay on that all the way past Westminster, where youll first turn off on North Retreat Road and then make your way westward via several other named roads to Tabor Rd, where you can cleanly cross US 123 and head up to North Horseshoe Bridge Road, again working westward until you finally enter Georgia on GA 184 near Toccoa.

,In Georgia, 17A, 385, 115 and 52 will get you to the outskirts of Dahlonega, but then you have to take a side road just to avoid some nonsense with US 19.

Then you can take GA 9 west out of town, and 53 all the way to Rome where 20 will take you out of Georgia and into Alabama.

,In bama things mostly get easier for a ways, in that you can make good use of AL 9 for heading south.

Theres a bit of a fuzzup up with that plan as you hit the US 78 / I-20 corridor, but you can avoid it by taking Choccolocco Rd (fun name!) to CR 45 and CR 24 to AL 281.

AL 49 will then rejoin you to AL 9 for a good stretch before US 231 at Wetumpka presents the next challenge.

Honestly at this point Im boring even myself with the whole exercise, so I wont bother spelling out the many choices of state, county and named roads that can be used to continue south.

In short, you do have a lot of US routes to avoid but plenty of other roads to the east and southeast of Montgomery, by which you can eventually enter Florida on something like AL 167 at Esto.

,From Esto the final leg is trivial.

FL 79 dives south to just outside Panama City Beach and your final US highway crossing.

FL 30 runs along the Gulf Coast, and looks to have several hotel options for a well-deserved rest.

Hope you had a good ride.

Skyline Drive map

Nowhere has truly reasonable housing costs.

Anywhere within a 2 hour commute will be unreasonable.

But there are a few anomalies which are slightly less ridiculous.

,Silicon Valley is a big place, though, so depends where you work now, and where you might be working in the future u2014 take that into account too, people hop jobs a lot here.

,A few anomalies: Pacifica.

The unincorporated areas on Skyline drive.

Alameda and Treasure Island.

West Oakland.

Richmond.

Benicia.

Niles and Alvarado Canyon.

Candlestick Point and Brisbane.

Each of these has some sort of trade off, and only has a reasonable commute to some areas, so check the map!,Or else, get roommates.

In the Bay Area, where everything is expensive, that has a much bigger effect in housing costs than location ever could.